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 ...
TweakTown

Xbox app full screen experience leaked, can run on handheld PCs with Windows 11 25H2

The new-and-improved Xbox app for handhelds has been leaked through builds of the OS, and can run on any handheld gaming PC running Windows 11 25H2.

Microsoft’s new Xbox mode on Windows has leaked for any handheld

The new Xbox full-screen experience doesn’t load the full Windows desktop or a bunch of background processes, freeing up more ...