I installed Dolphin via EmuDeck today. I setup the correct udev rule and enabled Bluetooth Passthrough in Dolphin. On SteamOS it worked but on Bazzite it is stuck on a black screen when starting a game. Have I to do something else?
This is a question for EmuDeck/Steam ROM Manager. I can confirm Dolphin works properly on my setup running Bazzite.
I had a similar issue recently. I had to un-check Render to Main Window in the General Graphics configuration. Perhaps that would also work for you.