The application reports crashes and device health metrics to nRF Cloud through the Memfault SDK. The data goes through the nRF Cloud CoAP session (CONFIG_MEMFAULT_USE_NRF_CLOUD_COAP), and the cloud module posts pending data on every cloud synchronization.
See Remote debugging with nRF Cloud for how to view device data in nRF Cloud, upload zephyr.elf, and verify data collection.