Honestly, I feel like I'd be more suspicious of someone who had little to nothing installed on their phone.
Even more of a reason for good and easy backup and restore.
Before travel back up the real contents and restore a dummy travel backup with random games, stock photos etc. Then restore back to real contents.
Sure but there'd be nothing there.
If the regime is going to just start taking people then nothing will stop that, but the goal is to stop the usefulness of this sort of thing as an intimidation measure - or at least drag it to the forefront and overthrow the regime.
The easiest way to avoid suspicion is to have a phone filled with cat and family pictures, dumb apps and games.
You don't avoid scrutiny by being wierd and hiding things, but by hiding in plain sight by being ultra boring.
A lot of people are still using their smartphone pretty much as a dumbphone with a web browser.