As others already stated there are solutions already to pin apps and to be honest, I feel I would not give the phone to a policeman like that.

On the other hand, what I’m more concerned about is giving the access to my phone’s data through different permissions to my government.

For example this is the list of permissions for the Hungarian government app: https://reports.exodus-privacy.eu.org/en/reports/hu.gov.dap.app/latest/#trackers