You can install the new Xbox Full screen experience mode for Windows on handhelds but whether it will work is another question entirely

Microsoft's "Full screen experience" mode for handheld gaming PCs shouldn't officially be usable yet, but it turns out you ...
Pure Xbox

Xbox's New Handheld UI Has Become Available, And It's Giving FPS & Battery Improvements

The Xbox Full Screen Experience, of course, is the name for Xbox's new handheld UI on the ROG Xbox Ally - a way of ditching the bloat of Windows and providing an easy-to-use interface akin to the ...
Ars Technica

Full-screen Xbox handheld UI is coming to all Windows PCs “starting next year”

One weakness of Valve's Steam Deck gaming handheld and SteamOS is that, by default, they will only run Windows games from Steam that are supported by the platform's Proton compatibility layer (plus ...