We don't have to wonder. Samuel Tunick is being federally prosecuted for exactly that. As far as I remember, he didn't even trigger the wipe himself, ICE did while fumbling with his phone when he correctly shut the fuck up after they demanded his pin. They arrested him (a legal US citizen) and charged him with concealing and destroying CSAM material.

According to recent articles, almost 6 months later and the court has just now agreed that ICE lied about the events and evidence they claimed existed. 6 months of his life for getting off a plane in an airport, randomly being detained, and committing the "crime" of wanting his privacy respected on a device he owns.

For those who somehow struggle with the point being made here: Police stopping you, demanding access to your private device, and then railroading you through the system for standing up for yourself is fascism regardless of the nation it takes place in. It's naive to assume police in other countries somehow have more altruistic goals or intentions when they do the exact same things with the exact same rhetoric.