This topic was covered in a blog post (“Enabling Bluetooth-to-Cloud on the Arduino Nicla Sense ME”) and associated forum post. However, we called out the Arduino hardware (which uses the Nordic Semiconductor nRF52832).
The examples in the Pouch repository for BLE_GATT were tested on the nRF52840 and should work with NCS. This page will be updated as other parts are tested and issues are found.