It appears that Apex Legends from Respawn and EA has started banning some players on Linux, and while the Steam Deck uses Linux too it seems nearly all the bans were desktop Linux players.
Currently in Early Access with Native Linux support and rated Steam Deck Playable, the inventory management roguelike Backpack Hero is releasing in full in May.
Totally Accurate Battlegrounds got upgraded recently due to needing to implement new anti-cheat, and thanks to that this free to play game now works on Linux Desktop and Steam Deck.
ChimeraOS, the Linux distribution designed for couch gaming much like SteamOS, has version 39 out now. This is the first release since Valve swapped to the New Big Picture Mode from the Steam Deck.
Mesa 23.0.0 has been released today upgrading open source graphics drivers for Linux. As usual you should wait for the first point release for stability.
Canonical has announced a change in the packaging defaults for the various "flavours" like Kubuntu, Ubuntu MATE, Ubuntu Budgie and so on to exclude Flatpak and stick with Snap.