NTSYNC for Proton / Wine now in Linux kernel 6.14 that "Should make many SteamOS users happy"
Seems like the upcoming Linux kernel 6.14 release is going to be a nice one for gamers on Linux / Steam Deck, as the NTSYNC code has now been properly merged in ready.
How to setup OpenMW for modern Morrowind on Linux / SteamOS and Steam Deck
How to install Hollow Knight: Silksong mods on Linux, SteamOS and Steam Deck