Bazzite is an alternative operating system for the Steam Deck and for Desktop PCs that closely emulates SteamOS, with numerous additional features and improvements on top. We use immutable Fedora as a base, and allow packages to be layered and kept through updates unlike stock SteamOS. You can even print and change the language from English if you want.
An alternative SteamOS-like distro built on Fedora for Steam Deck and Desktop
ublue is entirely OCI images built on immutable Fedora, think of them as Fedora plus a recipe on top.