Fedora Linux devs discuss dropping 32-bit packages - potentially bad news for Steam gamers
(www.gamingonlinux.com)
Since Wine 9.0, you can run 32-bit windows apps on 64-bits directly, without the need for 32bits distro support. It's called WoW64. You can read about it in here: https://gitlab.winehq.org/wine/wine/-/releases/wine-9.0#wow64.
It's not yet enabled by default and existing 32-bit prefixes needs to be recreated Arch is migrating to it
Native Linux games on Steam run on top of steam-runtime, a collection of libs (32 and 64 bits) running in a container called pressure-vessel. In theory they don't need 32 bits distro support.
Steam Linux client itself is 32-bits. Unfortunately