Is there any compatibility issue between XBee devices and other Zigbee stack protocol devices with Nordic SoC?
Assuming that the Nordic SoC is running a Zigbee Public profile, I would think that it would communicate.
If you use pure 802.15.4 (MAC) stack it works out of the box with nrfxlib 2.0, but you need to assemble your 802.15.4 packet yourself (which is trivial). I have this working and tested on nrf52811 as a replacement for currently totally unavailable XBee PRO modules on the market.
Nordic provides ZigBee stack as a part of nrfx libs (https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.0.0/nrfxlib/zboss/README.html) so best way would be to study this implementation for compat (https://developer.nordicsemi.com/nRF_Connect_SDK/doc/zboss/126.96.36.199/index.html)