After upgrading to 20.10 ( 19.10 => 20.01 => 20.10) I'm experiencing the same issue.
in my case HDA Intel PCH, this card has multiple profiles and i get a different list of random profiles on ever boot.
After restarting pulse ( systemctl --user restart pulseaudio.service) i get all usable profiles.
Also I'm on KDE
After upgrading to 20.10 ( 19.10 => 20.01 => 20.10) I'm experiencing the same issue.
in my case HDA Intel PCH, this card has multiple profiles and i get a different list of random profiles on ever boot.
After restarting pulse ( systemctl --user restart pulseaudio.service) i get all usable profiles.
Also I'm on KDE