I just realized this feature is available from NCS V3.3.0.
Does it support nRF52 series such as nRF52832 with DFU through BLE?
In this page, it seems only nRF54 are included:
https://docs.nordicsemi.com/bundle/ncs-3.3.0/page/nrf/samples/dfu/single_slot/README.html
Thank you!