Assuming the rule of law is still functioning, there are multiple protections for journalists who refuse to divulge passwords in the USA. A journalist can challenge any such order in court and usually won't be detained during the process as long as they show up in court when required and haven't tried to destroy evidence.

Deceiving investigators by using an alternate password, or destroying evidence by using a duress code on the other hand is almost always a felony. It's a very bad idea for a journalist to do that, as long as the rule of law is intact.

I think it's pretty clear at this point that rule of law isn't functioning. Perhaps it never was. It was just rule of law theater.