After going open source back in mid 2022, the Wii U emulator Cemu started providing experimental builds with Linux support and now it's out proper with the new Cemu 2.1 release.
If you don't have any other emulators set up, i would recommend to just use emudeck, its supposed to help set up all the emulators that you pick and sets the recommended settings and controls for the steam deck.
Oh man, I hadn't heard of emudeck and was just about to start running emulation on my new deck. Any other amazing tips like this? I have run emulators for years but only on windows on my desktop.
I have set up emudeck. Works for nes, snes, gba, ps1, Wii, and ps2 without issue. It's only when I tried Wii U and ps3 that I ran into into problems. I do know it's possible, but I got tired of tweaking