There's no great reason for these to be Android/Apple specific. I'm just offering examples as requested.
Allows you to have a digital copy of your ID and sign in to government sites/services (there are alternative methods).
Wouldn’t well designed mobile web-apps suffice for that use case? I have several web-app site shortcuts linked on my Home Screen which behave just like the native apps. In most cases I don’t see why that would not be sufficient, including most “government apps” use cases