I’ve used Arch, Pop_OS for gaming in the past, was looking for a distro that just works and doesn’t have any extra fluff or do anything nonstandard. (For example I don’t like that some programs will only update through the pop shop on pop os and not through the terminal.)
Literally any of them.
All you do is install your drivers if using Nvidia, then just install your games, whether native packages, flatpak, Steam, Lutris, or whatever.
I just run Debian 12 and everything through Lutris or native. Used to run Steam through Flatpak which also worked perfectly, but don’t play any games on Steam anymore.