[Solved] unable to fully uninstall "Materal Files" app

I installed an app called "Material Files". I believe that I originally installed it via the f-droid app store.

I uninstalled the app, but the icon is still stuck on my home-screen.

I've tried reinstalling it, and uninstalling it via the f-droid store, the Software store, and in settings, but it is still on my desktop.

The normal icon has disappeared, and it looks like a placeholder icon.

Is there any way for me to "force" uninstall it?

Whenever I start the app, journalctl says:

batman-nicerdicer[3314]: Set niceness of program 'phosh' with PID 17387 to -20
batman-nicerdicer[3314]: Set niceness of thread 17387 of program 'phosh' with PID 17387 to -20
batman-nicerdicer[3314]: Set niceness of program 'phosh' with PID 17388 to -20
batman-nicerdicer[3314]: Set niceness of thread 17388 of program 'phosh' with PID 17388 to -20
systemd[2378]: Started app-gnome-android.me.zhanghai.android.files-17388.scope - Application launched by phosh.