Well, you aren't going to be creating a driving licence or passport in your app, so there's no need to delete that data. You're just providing users with a way to view already existing data via an app.
What you need to provide is a way to delete data that your app creates.
If users can create an account on a government website (outside of your app) and login to your app with those same credentials, or they can create an account in the app and login to the government website with those same credentials, then there should be no requirement to delete the login details or user account.
If, however, the app creates a brand new account used solely for the app, then this is what must be available for deletion.
What you also might have to offer is the deletion of any data pertaining to the use of the app, e.g. logs or app customisations saved as a file on government servers. An example might be a preferences file that's created in the app and uploaded to the server.