In landscape mode the WallpaperService.Engine.onTouchEvent(e: MotionEvent) returns coordinate (0,maxY) for every pointer.
This entirely prevents interactive live wallpapers from working in landscape mode.
Issue found in:
Note 9, OneUI 2.1, Android 10
Note 9, “Lawnchair” Launcher, Android 10
A20e, OneUI 2.0, Android 10
Works in:
S8, OneUI 1.0, Android 9
Android Emulator API version 29
Doro, Android 6