Fyne is an interesting library, and although I'm sure it can do a good job on the desktop, last time I tried it I was disappointed by how "meh" it works on mobile (Android in my case).

It does run, but I feel like it's more of a prototyping tool, or a tool for building internal apps. It's kinda slow, graphically inconsistent with the rest of Android, and it has little to no support for features like foreground services, the camera, and more.

I really hope they can improve, but with limited resources and funding, and such a wide scope, I'm not sure if they will ever be ready for more complex projects. In any case, best of luck to the devs!