Here's a NYT post on Facebook about the GrapheneOS phone-wiping charges, and the Americans commenting show how far Americans are ahead of all other nationalities I know of in terms of civil and constitutional rights and technicalities.
Among the comments on this and other posts is that while the FedGov wants to set a precedent that citizens not be allowed to wipe their phone so border agents can't review their private data at will, without any charge or reasonable suspicion. That's what the FedGov wants, but actually this story is getting traction and will make everyone go out and get GrapheneOS phones, some suggested.
Many also noted that the Duress Code needs to be re-written to improve plausible deniability, for example it wipes real data but shows a plausible user account with apps in the phone.
Also, the man could charge the agent/government for destroying his phone contents, maybe, even though he gave the passcode that did it. There's a question of whether the agent himself is responsible/liable for 'destruction of evidence' if the government can unconstitutionally force this to be considered 'evidence'.
Currently, the border (and, technically, 100 miles of a US border which includes most major US cities) is a Constitution-free zone ie Americans have no rights either.
Citizens these days typically hide or avoid coming to a head with these government abuses which have become very common, because they don't want to be the one, and with good reason, because for decades at least the government has irresponsibly persecuted such people who stand up for or use their Constitutional rights, but maybe things have gone so far that if people currently do start challenging things, the courts and public opinion will be on their side.