No, not things in your brain. That's covered under the 5th amendment. Refusing to provide information is not the same as interfering. The portable brain scanner issue is an issue, but the legal system will get around to addressing that if and when it becomes practical enough for police to attempt using it.

The exceptions I know of are things like:

- In some situations you have to ID yourself (not just when you're driving, but that's the usual case, where they have legal authority to ID you, and if you don't have ID you have to provide the equivalent from memory so they can check your identity.)

- Face and Fingerprint unlocks are not things in your mind, they're not testimony, therefore you can be compelled to provide them, though usually by court order. If a cop in the field is forcing you to face- or fingerprint-unlock your phone, that might not be allowed.

- In a few jurisdictions, if it's a "foregone conclusion" what's on your phone, i.e. they know from other threads of the investigation what's on it, but it's just encrypted, they might be able to force you to unlock it in that case, but that's through a court order not during a field investigation.