Thanks.  In my case I was able to get it all working using the C to C cable and HDMI cable at the same time.  Going to activate it in our Webex Control Hub to get more functionality out of it with Teams.  Apparently doing this doesn't require Teams R...

Same issue here...Cisco sent us a basic Room Kit to test out.  Connected to PC with USB-C cable.  I get video and microphone no problem, but no way to set the audio device as the room bar using Teams.