Zigbee Groups work on all Hubitat hub models . The problem with the Tuya Smart Knob is that it is a Zigbee sleepy end device, so adding it to a group is a bit tricky, as it needs to be awaken at the time when the command ‘add to group’ is sent to the device. If you press the knob just prior clicking on the Save (or was it ‘Done’?) button from HE inbuilt Groups app it works.
Second problem was that the Tuya knob was not shown in the list of the devices that could be added to a Zigbee group. I have added some Dimmer capabilities in the new driver named “Zigbee Button Dimmer “ - you can manually install it from the link posted in the third post of the [RELEASE] Tuya Scene Switch TS004F driver (w/ healthStatus) - #3 by kkossev) thread.
