Quote Originally Posted by shnorrer View Post
An update: rebooting another one time, I changed from SLE classic to Cinnamon. Now I can hear the audio from the PC but still I cannot do the same with the headphone.
I couldn't know the desktop version can change the audio result.

Now, for the headphones, what could I do?
can you test with a new user? You need to start pipewire and wireplumber for this new user via systemctl.
If it work then it is in the user settings that there are bad data. Never used cinnamon or gnome but for KDE you should remove the ~/.cache directory.