SteamOS has a lot of bleeding edge code for newer features like HDR support that work well on the Steam Deck. But those features are still buggy and not as well tested on other hardware. That’s why there’s no general purpose SteamOS 3.x release yet.

So gaming distros like Nobara that also use the same code are going to have some problems and you can’t really fault them when upstream isn’t stable yet. If you want something less bleeding edge, use Fedora, Debian, etc.

The good news is that things will get better. It’s just going to take some more time.