О, а вот и первый не стимдек на SteamOS официально https://www.ayaneo.com/article/806

AYANEO has confirmed more details to GamingOnLinux about the software, and it's not quite as good news as we originally hoped. The Next Lite is not going to be running SteamOS, at least, officially, and there's no partnership with Valve. It will instead be using HoloISO, a community distro based on SteamOS which has, in the past, had questionable reliability.