ITEAD of Sonoff fame now sells a very inexpensive Zigbee USB dongle that should work out-of-the-box with both Zigbee2mqtt and the ZHA integration

I hope this comes soon. There is a real need for a good dongle solution. nrf53840 dongle is the best dongle, but nordic support is so unsupportive for this dongle - hence you can make end devices with the same but not the co-ordiantor