diff --git a/subsys/net/lib/lwm2m/CMakeLists.txt b/subsys/net/lib/lwm2m/CMakeLists.txt
index 2e895ec381b..7246ff70999 100644
--- a/subsys/net/lib/lwm2m/CMakeLists.txt
+++ b/subsys/net/lib/lwm2m/CMakeLists.txt
@@ -127,4 +127,6 @@ zephyr_library_sources_ifdef(CONFIG_LWM2M_SHELL
     lwm2m_shell.c
 )
 
+zephyr_linker_sources(SECTIONS iterables.ld)
+
 zephyr_library_link_libraries_ifdef(CONFIG_MBEDTLS mbedTLS)
diff --git a/subsys/net/lib/lwm2m/ipso_accelerometer.c b/subsys/net/lib/lwm2m/ipso_accelerometer.c
index 2458bf75321..0c1be988408 100644
--- a/subsys/net/lib/lwm2m/ipso_accelerometer.c
+++ b/subsys/net/lib/lwm2m/ipso_accelerometer.c
@@ -157,4 +157,4 @@ static int ipso_accel_init(void)
 	return 0;
 }
 
-SYS_INIT(ipso_accel_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ipso_accel_init);
diff --git a/subsys/net/lib/lwm2m/ipso_buzzer.c b/subsys/net/lib/lwm2m/ipso_buzzer.c
index 4bd41735fa6..f679d7e4a60 100644
--- a/subsys/net/lib/lwm2m/ipso_buzzer.c
+++ b/subsys/net/lib/lwm2m/ipso_buzzer.c
@@ -258,4 +258,4 @@ static int ipso_buzzer_init(void)
 	return 0;
 }
 
-SYS_INIT(ipso_buzzer_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ipso_buzzer_init);
diff --git a/subsys/net/lib/lwm2m/ipso_current_sensor.c b/subsys/net/lib/lwm2m/ipso_current_sensor.c
index 0684db94220..1268b7da56d 100644
--- a/subsys/net/lib/lwm2m/ipso_current_sensor.c
+++ b/subsys/net/lib/lwm2m/ipso_current_sensor.c
@@ -228,5 +228,4 @@ static int ipso_current_sensor_init(void)
 	return 0;
 }
 
-SYS_INIT(ipso_current_sensor_init, APPLICATION,
-	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ipso_current_sensor_init);
diff --git a/subsys/net/lib/lwm2m/ipso_filling_sensor.c b/subsys/net/lib/lwm2m/ipso_filling_sensor.c
index 072d6d35bbb..96944e0c16a 100644
--- a/subsys/net/lib/lwm2m/ipso_filling_sensor.c
+++ b/subsys/net/lib/lwm2m/ipso_filling_sensor.c
@@ -228,7 +228,7 @@ static struct lwm2m_engine_obj_inst *filling_sensor_create(uint16_t obj_inst_id)
 	return &inst[index];
 }
 
-static int init(void)
+static int fill_sensor_init(void)
 {
 	fill_sensor.obj_id = IPSO_OBJECT_ID;
 	fill_sensor.version_major = FILLING_VERSION_MAJOR;
@@ -243,4 +243,4 @@ static int init(void)
 	return 0;
 }
 
-SYS_INIT(init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(fill_sensor_init);
diff --git a/subsys/net/lib/lwm2m/ipso_generic_sensor.c b/subsys/net/lib/lwm2m/ipso_generic_sensor.c
index def650ce9e4..05a1afc9806 100644
--- a/subsys/net/lib/lwm2m/ipso_generic_sensor.c
+++ b/subsys/net/lib/lwm2m/ipso_generic_sensor.c
@@ -237,5 +237,4 @@ static int ipso_generic_sensor_init(void)
 	return 0;
 }
 
-SYS_INIT(ipso_generic_sensor_init, APPLICATION,
-	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ipso_generic_sensor_init);
diff --git a/subsys/net/lib/lwm2m/ipso_humidity_sensor.c b/subsys/net/lib/lwm2m/ipso_humidity_sensor.c
index 24be33d37f2..b2d147060a0 100644
--- a/subsys/net/lib/lwm2m/ipso_humidity_sensor.c
+++ b/subsys/net/lib/lwm2m/ipso_humidity_sensor.c
@@ -218,5 +218,4 @@ static int ipso_humidity_sensor_init(void)
 	return 0;
 }
 
-SYS_INIT(ipso_humidity_sensor_init, APPLICATION,
-	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ipso_humidity_sensor_init);
diff --git a/subsys/net/lib/lwm2m/ipso_light_control.c b/subsys/net/lib/lwm2m/ipso_light_control.c
index fc9a897461a..b7f727ff4a4 100644
--- a/subsys/net/lib/lwm2m/ipso_light_control.c
+++ b/subsys/net/lib/lwm2m/ipso_light_control.c
@@ -201,5 +201,4 @@ static int ipso_light_control_init(void)
 	return 0;
 }
 
-SYS_INIT(ipso_light_control_init, APPLICATION,
-	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ipso_light_control_init);
diff --git a/subsys/net/lib/lwm2m/ipso_onoff_switch.c b/subsys/net/lib/lwm2m/ipso_onoff_switch.c
index 3bf8ba65c4e..3da496b2ca1 100644
--- a/subsys/net/lib/lwm2m/ipso_onoff_switch.c
+++ b/subsys/net/lib/lwm2m/ipso_onoff_switch.c
@@ -249,4 +249,4 @@ static int ipso_switch_init(void)
 	return 0;
 }
 
-SYS_INIT(ipso_switch_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ipso_switch_init);
diff --git a/subsys/net/lib/lwm2m/ipso_pressure_sensor.c b/subsys/net/lib/lwm2m/ipso_pressure_sensor.c
index 87f87e4a277..7dca2ed3956 100644
--- a/subsys/net/lib/lwm2m/ipso_pressure_sensor.c
+++ b/subsys/net/lib/lwm2m/ipso_pressure_sensor.c
@@ -221,5 +221,4 @@ static int ipso_pressure_sensor_init(void)
 	return 0;
 }
 
-SYS_INIT(ipso_pressure_sensor_init, APPLICATION,
-	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ipso_pressure_sensor_init);
diff --git a/subsys/net/lib/lwm2m/ipso_push_button.c b/subsys/net/lib/lwm2m/ipso_push_button.c
index 2cccd276aa9..07782a86756 100644
--- a/subsys/net/lib/lwm2m/ipso_push_button.c
+++ b/subsys/net/lib/lwm2m/ipso_push_button.c
@@ -186,4 +186,4 @@ static int ipso_button_init(void)
 	return 0;
 }
 
-SYS_INIT(ipso_button_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ipso_button_init);
diff --git a/subsys/net/lib/lwm2m/ipso_temp_sensor.c b/subsys/net/lib/lwm2m/ipso_temp_sensor.c
index bdf59563833..ba843db0ebd 100644
--- a/subsys/net/lib/lwm2m/ipso_temp_sensor.c
+++ b/subsys/net/lib/lwm2m/ipso_temp_sensor.c
@@ -221,5 +221,4 @@ static int ipso_temp_sensor_init(void)
 	return 0;
 }
 
-SYS_INIT(ipso_temp_sensor_init, APPLICATION,
-	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ipso_temp_sensor_init);
diff --git a/subsys/net/lib/lwm2m/ipso_timer.c b/subsys/net/lib/lwm2m/ipso_timer.c
index 6085d36d04c..833002e56c4 100644
--- a/subsys/net/lib/lwm2m/ipso_timer.c
+++ b/subsys/net/lib/lwm2m/ipso_timer.c
@@ -366,4 +366,4 @@ static int ipso_timer_init(void)
 	return 0;
 }
 
-SYS_INIT(ipso_timer_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ipso_timer_init);
diff --git a/subsys/net/lib/lwm2m/ipso_voltage_sensor.c b/subsys/net/lib/lwm2m/ipso_voltage_sensor.c
index 55b45902234..ec1274d07ff 100644
--- a/subsys/net/lib/lwm2m/ipso_voltage_sensor.c
+++ b/subsys/net/lib/lwm2m/ipso_voltage_sensor.c
@@ -229,5 +229,4 @@ static int ipso_voltage_sensor_init(void)
 	return 0;
 }
 
-SYS_INIT(ipso_voltage_sensor_init, APPLICATION,
-	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ipso_voltage_sensor_init);
diff --git a/subsys/net/lib/lwm2m/iterables.ld b/subsys/net/lib/lwm2m/iterables.ld
new file mode 100644
index 00000000000..83ce9070ef0
--- /dev/null
+++ b/subsys/net/lib/lwm2m/iterables.ld
@@ -0,0 +1 @@
+ITERABLE_SECTION_ROM(lwm2m_init_func, 4)
diff --git a/subsys/net/lib/lwm2m/lwm2m_engine.c b/subsys/net/lib/lwm2m/lwm2m_engine.c
index bad54c521d7..ba408c1de8e 100644
--- a/subsys/net/lib/lwm2m/lwm2m_engine.c
+++ b/subsys/net/lib/lwm2m/lwm2m_engine.c
@@ -1330,9 +1330,12 @@ static int lwm2m_engine_init(void)
 	(void)memset(output_block_contexts, 0, sizeof(output_block_contexts));
 #endif
 
-	if (IS_ENABLED(CONFIG_LWM2M_RESOURCE_DATA_CACHE_SUPPORT)) {
-		/* Init data cache */
-		lwm2m_engine_data_cache_init();
+	STRUCT_SECTION_FOREACH(lwm2m_init_func, init) {
+		int ret = init->f();
+
+		if (ret) {
+			LOG_ERR("Init function %p returned %d", init, ret);
+		}
 	}
 
 	/* start sock receive thread */
diff --git a/subsys/net/lib/lwm2m/lwm2m_engine.h b/subsys/net/lib/lwm2m/lwm2m_engine.h
index 81b28395662..bd96a380cf7 100644
--- a/subsys/net/lib/lwm2m/lwm2m_engine.h
+++ b/subsys/net/lib/lwm2m/lwm2m_engine.h
@@ -12,6 +12,7 @@
 #include "lwm2m_object.h"
 #include "lwm2m_observation.h"
 #include "lwm2m_registry.h"
+#include <zephyr/kernel.h>
 
 #define LWM2M_PROTOCOL_VERSION_MAJOR 1
 #if defined(CONFIG_LWM2M_VERSION_1_1)
@@ -30,6 +31,65 @@
 /* length of time in milliseconds to wait for buffer allocations */
 #define BUF_ALLOC_TIMEOUT K_SECONDS(1)
 
+/** initialization function */
+struct lwm2m_init_func {
+	int (*f)(void);
+};
+/**
+ * @defgroup LWM2M_PRIO LwM2M initialization priorities
+ * @{
+ */
+#define LWM2M_PRIO_ENGINE 0	/**< Engine initialization */
+#define LWM2M_PRIO_CORE 1	/**< Core object initialization */
+#define LWM2M_PRIO_OBJ 2	/**< Object initializations */
+#define LwM2M_PRIO_APP 3	/**< Application logic initialization */
+/** @} */
+
+/**
+ * @brief Declare an initialization function to be executed when LwM2M engine starts.
+ *
+ * When LwM2M engine starts up, it first executes all initialization functions in following
+ * priority order:
+ * 1. LWM2M_PRIO_ENGINE
+ * 2. LWM2M_PRIO_CORE, this is where all LwM2M core objects are initialized
+ * 3. LWM2M_PRIO_OBJ, this is where all other than core objects are initialized
+ * 4. LwM2M_PRIO_APP, application initialization.
+ *                    For example create sensor objects, and register object callbacks.
+ *
+ * @param[in] prio Priority, one of @ref LWM2M_PRIO macros.
+ * @param[in] init_function Initialization function
+ */
+#define LWM2M_ON_INIT(prio, init_function)                                                         \
+	STRUCT_SECTION_ITERABLE(lwm2m_init_func,                                                   \
+				CONCAT(LWM2M, prio, init_function)) = {.f = init_function}
+
+/**
+ * @brief Declare engine initialization function.
+ * @sa LWM2M_ON_INIT
+ * @param[in] init_function Initialization function
+ */
+#define LWM2M_ENGINE_INIT(init_function) LWM2M_ON_INIT(LWM2M_PRIO_ENGINE, init_function)
+
+/**
+ * @brief Declare core object initialization function.
+ * @sa LWM2M_ON_INIT
+ * @param[in] init_function Initialization function
+ */
+#define LWM2M_CORE_INIT(init_function) LWM2M_ON_INIT(LWM2M_PRIO_CORE, init_function)
+
+/**
+ * @brief Declare object initialization function.
+ * @sa LWM2M_ON_INIT
+ * @param[in] init_function Initialization function
+ */
+#define LWM2M_OBJ_INIT(init_function) LWM2M_ON_INIT(LWM2M_PRIO_OBJ, init_function)
+
+/**
+ * @brief Declare application specific initialization function.
+ * @sa LWM2M_ON_INIT
+ * @param[in] init_function Initialization function
+ */
+#define LWM2M_APP_INIT(init_function) LWM2M_ON_INIT(LWM2M_PRIO_APP, init_function)
 
 /**
  * @brief Validates that writing is a legal operation on the field given by the object in
diff --git a/subsys/net/lib/lwm2m/lwm2m_obj_access_control.c b/subsys/net/lib/lwm2m/lwm2m_obj_access_control.c
index 383dbe9b539..e5eb8c56efb 100644
--- a/subsys/net/lib/lwm2m/lwm2m_obj_access_control.c
+++ b/subsys/net/lib/lwm2m/lwm2m_obj_access_control.c
@@ -439,4 +439,4 @@ static int ac_control_init(void)
 	return 0;
 }
 
-SYS_INIT(ac_control_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_CORE_INIT(ac_control_init);
diff --git a/subsys/net/lib/lwm2m/lwm2m_obj_binaryappdata.c b/subsys/net/lib/lwm2m/lwm2m_obj_binaryappdata.c
index e9166f9e678..51e90b820ec 100644
--- a/subsys/net/lib/lwm2m/lwm2m_obj_binaryappdata.c
+++ b/subsys/net/lib/lwm2m/lwm2m_obj_binaryappdata.c
@@ -122,4 +122,4 @@ static int lwm2m_binaryappdata_init(void)
 	return ret;
 }
 
-SYS_INIT(lwm2m_binaryappdata_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(lwm2m_binaryappdata_init);
diff --git a/subsys/net/lib/lwm2m/lwm2m_obj_connmon.c b/subsys/net/lib/lwm2m/lwm2m_obj_connmon.c
index 70309a0d3d6..a3cfaad8fa2 100644
--- a/subsys/net/lib/lwm2m/lwm2m_obj_connmon.c
+++ b/subsys/net/lib/lwm2m/lwm2m_obj_connmon.c
@@ -222,4 +222,4 @@ static int lwm2m_connmon_init(void)
 	return ret;
 }
 
-SYS_INIT(lwm2m_connmon_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_CORE_INIT(lwm2m_connmon_init);
diff --git a/subsys/net/lib/lwm2m/lwm2m_obj_device.c b/subsys/net/lib/lwm2m/lwm2m_obj_device.c
index f5399fefc1e..c4abb72d506 100644
--- a/subsys/net/lib/lwm2m/lwm2m_obj_device.c
+++ b/subsys/net/lib/lwm2m/lwm2m_obj_device.c
@@ -393,4 +393,4 @@ static int lwm2m_device_init(void)
 	return ret;
 }
 
-SYS_INIT(lwm2m_device_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_CORE_INIT(lwm2m_device_init);
diff --git a/subsys/net/lib/lwm2m/lwm2m_obj_event_log.c b/subsys/net/lib/lwm2m/lwm2m_obj_event_log.c
index 907dd596611..e80dfc10ee6 100644
--- a/subsys/net/lib/lwm2m/lwm2m_obj_event_log.c
+++ b/subsys/net/lib/lwm2m/lwm2m_obj_event_log.c
@@ -103,4 +103,4 @@ static int lwm2m_event_log_init(void)
 	return ret;
 }
 
-SYS_INIT(lwm2m_event_log_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(lwm2m_event_log_init);
diff --git a/subsys/net/lib/lwm2m/lwm2m_obj_firmware.c b/subsys/net/lib/lwm2m/lwm2m_obj_firmware.c
index 1f0f6bb5b1e..082197c83a5 100644
--- a/subsys/net/lib/lwm2m/lwm2m_obj_firmware.c
+++ b/subsys/net/lib/lwm2m/lwm2m_obj_firmware.c
@@ -506,4 +506,4 @@ static int lwm2m_firmware_init(void)
 	return ret;
 }
 
-SYS_INIT(lwm2m_firmware_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_CORE_INIT(lwm2m_firmware_init);
diff --git a/subsys/net/lib/lwm2m/lwm2m_obj_gateway.c b/subsys/net/lib/lwm2m/lwm2m_obj_gateway.c
index 5bb12f80f47..106ef951653 100644
--- a/subsys/net/lib/lwm2m/lwm2m_obj_gateway.c
+++ b/subsys/net/lib/lwm2m/lwm2m_obj_gateway.c
@@ -206,7 +206,7 @@ static int lwm2m_gw_init(void)
 	lwm2m_gw.obj_id = LWM2M_OBJECT_GATEWAY_ID;
 	lwm2m_gw.version_major = GATEWAY_VERSION_MAJOR;
 	lwm2m_gw.version_minor = GATEWAY_VERSION_MINOR;
-	lwm2m_gw.is_core = true;
+	lwm2m_gw.is_core = false;
 	lwm2m_gw.fields = fields;
 	lwm2m_gw.field_count = ARRAY_SIZE(fields);
 	lwm2m_gw.max_instance_count = MAX_INSTANCE_COUNT;
@@ -215,4 +215,4 @@ static int lwm2m_gw_init(void)
 	return ret;
 }
 
-SYS_INIT(lwm2m_gw_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(lwm2m_gw_init);
diff --git a/subsys/net/lib/lwm2m/lwm2m_obj_location.c b/subsys/net/lib/lwm2m/lwm2m_obj_location.c
index 73c43ff78eb..b7b9828982c 100644
--- a/subsys/net/lib/lwm2m/lwm2m_obj_location.c
+++ b/subsys/net/lib/lwm2m/lwm2m_obj_location.c
@@ -117,4 +117,4 @@ static int ipso_location_init(void)
 	return ret;
 }
 
-SYS_INIT(ipso_location_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_CORE_INIT(ipso_location_init);
diff --git a/subsys/net/lib/lwm2m/lwm2m_obj_portfolio.c b/subsys/net/lib/lwm2m/lwm2m_obj_portfolio.c
index e5cdc2198e6..b77fc722130 100644
--- a/subsys/net/lib/lwm2m/lwm2m_obj_portfolio.c
+++ b/subsys/net/lib/lwm2m/lwm2m_obj_portfolio.c
@@ -122,4 +122,4 @@ static int lwm2m_portfolio_init(void)
 	return 0;
 }
 
-SYS_INIT(lwm2m_portfolio_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(lwm2m_portfolio_init);
diff --git a/subsys/net/lib/lwm2m/lwm2m_obj_security.c b/subsys/net/lib/lwm2m/lwm2m_obj_security.c
index 00796648634..a926cb39b27 100644
--- a/subsys/net/lib/lwm2m/lwm2m_obj_security.c
+++ b/subsys/net/lib/lwm2m/lwm2m_obj_security.c
@@ -261,4 +261,4 @@ static int lwm2m_security_init(void)
 	return ret;
 }
 
-SYS_INIT(lwm2m_security_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_CORE_INIT(lwm2m_security_init);
diff --git a/subsys/net/lib/lwm2m/lwm2m_obj_server.c b/subsys/net/lib/lwm2m/lwm2m_obj_server.c
index a9432340038..a7d3e541bbe 100644
--- a/subsys/net/lib/lwm2m/lwm2m_obj_server.c
+++ b/subsys/net/lib/lwm2m/lwm2m_obj_server.c
@@ -18,6 +18,7 @@ LOG_MODULE_REGISTER(LOG_MODULE_NAME);
 #include "lwm2m_obj_server.h"
 #include "lwm2m_rd_client.h"
 #include "lwm2m_registry.h"
+#include "lwm2m_engine.h"
 
 #define SERVER_VERSION_MAJOR 1
 #if defined(CONFIG_LWM2M_SERVER_OBJECT_VERSION_1_1)
@@ -458,4 +459,4 @@ static int lwm2m_server_init(void)
 	return ret;
 }
 
-SYS_INIT(lwm2m_server_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_CORE_INIT(lwm2m_server_init);
diff --git a/subsys/net/lib/lwm2m/lwm2m_obj_swmgmt.c b/subsys/net/lib/lwm2m/lwm2m_obj_swmgmt.c
index a8376ea8621..1ccd22520b6 100644
--- a/subsys/net/lib/lwm2m/lwm2m_obj_swmgmt.c
+++ b/subsys/net/lib/lwm2m/lwm2m_obj_swmgmt.c
@@ -794,4 +794,4 @@ static int lwm2m_swmgmt_init(void)
 	return 0;
 }
 
-SYS_INIT(lwm2m_swmgmt_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(lwm2m_swmgmt_init);
diff --git a/subsys/net/lib/lwm2m/lwm2m_rd_client.c b/subsys/net/lib/lwm2m/lwm2m_rd_client.c
index 22ce51e5248..99f673ce6b1 100644
--- a/subsys/net/lib/lwm2m/lwm2m_rd_client.c
+++ b/subsys/net/lib/lwm2m/lwm2m_rd_client.c
@@ -1791,6 +1791,4 @@ static int sys_lwm2m_rd_client_init(void)
 	return lwm2m_rd_client_init();
 }
 
-
-SYS_INIT(sys_lwm2m_rd_client_init, APPLICATION,
-	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_ENGINE_INIT(sys_lwm2m_rd_client_init);
diff --git a/subsys/net/lib/lwm2m/lwm2m_registry.c b/subsys/net/lib/lwm2m/lwm2m_registry.c
index 1701b7f7412..6c1bab92b25 100644
--- a/subsys/net/lib/lwm2m/lwm2m_registry.c
+++ b/subsys/net/lib/lwm2m/lwm2m_registry.c
@@ -2234,9 +2234,9 @@ int lwm2m_engine_enable_cache(const char *resource_path, struct lwm2m_time_serie
 #endif /* CONFIG_LWM2M_RESOURCE_DATA_CACHE_SUPPORT */
 }
 
-int lwm2m_engine_data_cache_init(void)
-{
 #if defined(CONFIG_LWM2M_RESOURCE_DATA_CACHE_SUPPORT)
+static int lwm2m_engine_data_cache_init(void)
+{
 	int i;
 
 	sys_slist_init(&lwm2m_timed_cache_list);
@@ -2244,9 +2244,10 @@ int lwm2m_engine_data_cache_init(void)
 	for (i = 0; i < ARRAY_SIZE(lwm2m_cache_entries); i++) {
 		lwm2m_cache_entries[i].path.level = LWM2M_PATH_LEVEL_NONE;
 	}
-#endif
 	return 0;
 }
+LWM2M_ENGINE_INIT(lwm2m_engine_data_cache_init);
+#endif
 
 bool lwm2m_cache_write(struct lwm2m_time_series_resource *cache_entry,
 		       struct lwm2m_time_series_elem *buf)
diff --git a/subsys/net/lib/lwm2m/lwm2m_registry.h b/subsys/net/lib/lwm2m/lwm2m_registry.h
index 0d817d00442..554babd93cd 100644
--- a/subsys/net/lib/lwm2m/lwm2m_registry.h
+++ b/subsys/net/lib/lwm2m/lwm2m_registry.h
@@ -242,7 +242,6 @@ struct lwm2m_cache_read_info {
 };
 #endif
 
-int lwm2m_engine_data_cache_init(void);
 struct lwm2m_time_series_resource *
 lwm2m_cache_entry_get_by_object(const struct lwm2m_obj_path *obj_path);
 bool lwm2m_cache_write(struct lwm2m_time_series_resource *cache_entry,
diff --git a/subsys/net/lib/lwm2m/ucifi_battery.c b/subsys/net/lib/lwm2m/ucifi_battery.c
index 11da0980967..468f4bbc4c3 100644
--- a/subsys/net/lib/lwm2m/ucifi_battery.c
+++ b/subsys/net/lib/lwm2m/ucifi_battery.c
@@ -150,4 +150,4 @@ static int ucifi_battery_init(void)
 	return 0;
 }
 
-SYS_INIT(ucifi_battery_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ucifi_battery_init);
diff --git a/subsys/net/lib/lwm2m/ucifi_lpwan.c b/subsys/net/lib/lwm2m/ucifi_lpwan.c
index 82878724405..0acbb0ecf3b 100644
--- a/subsys/net/lib/lwm2m/ucifi_lpwan.c
+++ b/subsys/net/lib/lwm2m/ucifi_lpwan.c
@@ -178,4 +178,4 @@ static int ucifi_lpwan_init(void)
 	return 0;
 }
 
-SYS_INIT(ucifi_lpwan_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+LWM2M_OBJ_INIT(ucifi_lpwan_init);
diff --git a/tests/net/lib/lwm2m/lwm2m_engine/CMakeLists.txt b/tests/net/lib/lwm2m/lwm2m_engine/CMakeLists.txt
index 36e161c6b11..d4a60e2bb9c 100644
--- a/tests/net/lib/lwm2m/lwm2m_engine/CMakeLists.txt
+++ b/tests/net/lib/lwm2m/lwm2m_engine/CMakeLists.txt
@@ -10,6 +10,7 @@ set(APP_SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src)
 target_sources(app PRIVATE ${APP_SRC_DIR}/main.c)
 target_sources(app PRIVATE ${APP_SRC_DIR}/stubs.c)
 target_sources(app PRIVATE ${ZEPHYR_BASE}/subsys/net/lib/lwm2m/lwm2m_engine.c)
+zephyr_linker_sources(SECTIONS ${ZEPHYR_BASE}/subsys/net/lib/lwm2m/iterables.ld)
 
 # Add includes directories
 target_include_directories(app PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src)
diff --git a/tests/net/lib/lwm2m/lwm2m_registry/src/lwm2m_registry.c b/tests/net/lib/lwm2m/lwm2m_registry/src/lwm2m_registry.c
index 8e99f666b7f..7763469bc4e 100644
--- a/tests/net/lib/lwm2m/lwm2m_registry/src/lwm2m_registry.c
+++ b/tests/net/lib/lwm2m/lwm2m_registry/src/lwm2m_registry.c
@@ -612,7 +612,6 @@ ZTEST(lwm2m_registry, test_resource_cache)
 	struct lwm2m_time_series_elem e;
 
 	/* Resource cache is turned off */
-	zassert_equal(lwm2m_engine_data_cache_init(), 0);
 	zassert_is_null(lwm2m_cache_entry_get_by_object(&path));
 	zassert_equal(lwm2m_enable_cache(&path, &e, 1), -ENOTSUP);
 	/* deprecated */