Since I upgraded from 19.10 to 20.04 the HDMI audio output option is not available. The option is not there in the sound settings GUI and in the pulseaudio volume control all profiles show as (unplugged) (unavailable)
I'm using NVidia GTX 1660 and have checked for driver updates and all.
I have tried multiple other answers which are more or less similar but in no case all the profiles shown in pavc were (unplugged)(unavailable) so I think it is specific to 20.04.
sudo apt install alsa-base libcanberra-pulse pulseaudio pulseaudio-module-bluetooth ubuntu-desktop ubuntu-desktop-minimal
.... This should restore your Bluetooth and reinstall removed packages. I also edited the answer to remove the part that might cause issues. – Raffa May 04 '20 at 19:04