Not sure why you're getting downvoted, but I wonder about that, too. SteamOS is primarily focused on Valve hardware, right? vs. something like CachyOS is Arch-based (so gets live updates/improvements ASAP) or Bazzite (immutable, so hard to break) and both are designed for general PC gaming, so likely have more attention to broad hardware/software/firmware compatibility.
If I were OP, I'd try live booting CachyOS to see if it works better.