Hi,
I was just thinking about your lost of audio issue (using Pipewire). So on one of my laptops (Gnome) yesterday I noticed that the OS said it could not detect sound. The problem I identified was the files in the two following directories may no longer be supported because they were too old (maybe syntax in the files changed.
The solution was to rename the two directories so new configurations could be created:
Pre-requisite: You have Wireplumber installed.
- Rename these directories:
~/.config/wireplumber
~/.local/state/wireplumber
- Reboot the machine (so files can be recreated).
Then check if audio starts working.
Source: