I haven't tried using a GUI library for this. But it is possible (and relatively easy) to build for Android using rust.

I found this tool called "x build" that works basically out of the box. It was a bit tricky to set up the release build, but got it working too.

I made a small App using winit+wgpu and it seems to work. Win it also has touchscreen-specific events.

Iced does use winit+wgpu, so if they are listening to the touchscreen events, it should work for Android. Haven't tested it though.