https://www.windowscentral.com/hardware/handheld-gaming-pc/how-to-stop-xbox-full-screen-experience-or-replace-it-on-windows-handhelds
Here's how to stop XFSE from opening on startup on Xbox Ally | Windows Central
Nov 21, 2025 - Xbox FSE is now available for all Windows handhelds, but if it's not to your taste, AnyFSE can make another game launcher boot at startup.