That sounds funny, but In that reality, the government with all its power will find a way in (they probably already have programs (as in departments) for finding their way into other countries tech).

Better to just install a proper de-googled android build (grapheneos, etc) and only use wifi (if data/phone num not needed) for the best odds.

In a couple of years (with more r&d, development and investment) I bet this will change to being use a linux phone.