If I'm not mistaken, proton didn't give anything to the FBI, they provided what was required by law to the Swiss government who then gave it to the FBI. It's a small distinction but it matters.
> Like if the FBI subpoenas my public key and I comply, that’s helping them?
If you're helping the FBI to do their job (conducting federal investigations), then yes, you are helping the FBI. Unless your definition of "to help" includes the absence of any possibly coercive circumstance.