@nlm You're right, but there is an unofficial version (with some tweaks to work on standards PC) available here.

It works as intended, but I would only recommend it if you intend to use your PC in a console-like setup (ie, plugged to a big screen, with a game controller).

I weirdly did not see anyone mentioning SteamOS? Formerly based on Ubuntu, now based on Arch, I believe.

It's the distribution that the #SteamDeck is packaged with, and so it's become my main gaming distrib now. :]