https://github.com/iDescriptor/iDescriptor
Currently it supports AppImage, but Flatpak version will possibly be available in future: https://github.com/iDescriptor/iDescriptor/issues/1

https://github.com/iDescriptor/iDescriptor
Currently it supports AppImage, but Flatpak version will possibly be available in future: https://github.com/iDescriptor/iDescriptor/issues/1

This is the only thing I’d use it for, so it would be nice if it could do it.