https://en.m.wikipedia.org/wiki/White_van_speaker_scam

Usually a knock off brand of inferior quality complete with fake magazine or fake website showing an insanely high retail price.

Yes but you could be compelled to decrypt devices, and detained for failing to do so

Buy some non US-based cloud storage and copy all your sensitive data to it, and delete said data from personal devices before leaving the country, so you can safely allow customs access to devices if required.

Retrieve data from the cloud when you arrive in the destination country.

Please tell me this isn’t what I think it is 👀