Valve's SteamOS 3.7 stable now officially supports Lenovo Legion Go S and offers limited support for other AMD-powered handheld gaming PCs.
While only Legion Go S and Steam Deck have official SteamOS support, Valve is working towards improving support for other handhelds in the future.
Gamers still have alternatives like Bazzite, a SteamOS clone with additional features, for handheld PC gaming.
Microsoft may need to enhance Windows 11 features for handhelds, as SteamOS on handhelds provides better user experience, especially with issues like game crashes on Windows.