You can apparently run the Windows version on Steam Deck using Proton (or so I am told :D). People have sent me messages saying it works well ^-^
Viewing post in Pure Onyx - Alpha Release June 2022 comments
yeah, I read about that. But, I already got other complicated stuff downloaded on it, I don't want it to affect my other stuff really. I also don't want to switch back and forth seeing how much a hassle it could be. I also managed to get Mod Organizer 2 on it. (which is funny bc) it needs windows, but I used a different version of mo2 and ran it with protons (I think), now it runs on Linux WITHOUT windows.