My question: I am not able to find the way to have a tray icon for bluetooth on the panel, since I would like to know which devices are currently paired (or simply turned on) and those aren’t.
I mean something simple like the icon we find in Mate, Gnome etc.
I beg your pardon
I always had blueman installed and didn’t notice it was removed from 22.04.
In that case I can only recommend you install;
sudo apt-get install blueman
Run it once and it will install itself to the status-notifier. It should show up if bluetooth is on. You should also get a menu entry under Preferences.