Cannot use Date-time command in Zephyr

[Jasonhood-P]

I hope to use the date time command in the Default/OS Management Group of mcumgr in Zephyr. I have opened the corresponding macro in prj and successfully compiled it. I sent the correct write command to the device via Bluetooth, but when I read the date time value, there seemed to be no change. Still the initial value from the beginning.
The chip I am using is NRF52833, with SDK version 2.6.1，here is my configuration file:


I don't know if it's because the RTC inside nrf52833 is a real-time counter rather than a real-time clock, causing Zephyr to be unable to find the correct driver?If someone could answer my question, I would be very grateful.