The default is the one displayed i.e. "Intel HDMI/DP LPE Audio" but is showing no controls for that.
For your "sof-bytcht cx2072X" can you hit F5 to display All channels, not just Playback and post screenshot.
But looking at Playback controls for that card, it does not look promising.
EDIT: I have done a websearch "cx2072X ubuntu 20.04" but not many hits. This one mentions a bug which is solved in Ubuntu 20.10, but Z16 is based on Ubuntu 20.04.
See last item in this: