Anyone used Trådfri Remote or Dimmer?

Somewhere, Mike mentioned that it uses a Zigbee payload Hubitat doesn't currently support. It's theoretically possible but would take platform additions and not just a new driver, so I wouldn't count on it, at least not soon.

But not all is necessarily lost: do you have a Hue Bridge network? If so, you can pair it to that and then link it to a bulb or few for direct manipulation of them. Hubitat will still get the updated status unless you disabled the refresh/polling on the Bridge integration.