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 ...
The Verge

Older Windows handhelds are getting Xbox full-screen upgrades too.

If you already bought a Windows gaming handheld, you might not need to upgrade your hardware to get the overhauled Xbox app, Game Bar, and Windows OS that Microsoft and Asus just announced. Xbox exec ...