Steam will indicate the compatibility of games with SteamOS devices not made by Valve
Currently, the Steam Deck is the only official portable PC running on SteamOS, but this is about to change. By the end of May, Lenovo plans to release the Legion Go S version, which will also operate on this operating system. Ahead of its release, Valve announced that in the coming weeks, Steam will begin indicating on game pages whether they are compatible with third-party devices on SteamOS or not.