The only problem is that there isn’t an iOS version, which can be a problem for some. But yeah, good luck to the autorities to block that.
And IMO if you’re protesting, you may want to have a cheap Android phone you’re willing to lose, with only the apps and data that you need (ie: F-Droid, Briar, Organic Maps, Ripple, Cryptomator with encrypted photo backup to the cloud). If the autorities takes it from you it will be of limited value to them, and you’ll have your main phone safe at home.