Hello, I'm new here.
Not the only one I use the AppImage too in an x86_64 Ubuntu 25.04 plucky system.
But I'm also using Ubuntu 25.04 in a Raspberry Pi 5 (arm64) but there I use the Windows 64 version of Raine because is easier to emulate x86_64 thru wine that use the AppImage. If you make an AppImage for arm64 I'll be glad to test (and use) it.
Thanks and best regards.