I’d like to find this out too. My main computer is a Mac, so I will likely just buy it and try it out on there, but I hope it works cleanly on the deck.
I read just a couple of days ago that they’re committed to supporting the deck, but as of now I don’t see the supported icon.
I have had issues with some “works great” games - cyberpunk in particular has an issue with things like text size so I’ll try it with the deck hooked to a monitor and with a keyboard and mouse - but I’m hoping that BG3 will work out of the gate,l (so to speak).