The driver is always required to provide identification showing that they are licensed to operate the vehicle. I’m not a lawyer, but generally if state law does not require providing identification when requested by law enforcement (e.g. as a passenger), then refusing to do so does not constitute probable cause. In some jurisdictions, the requirement for identification does not actually require documentation, just that you give your name and address.
Note that there is no legal requirement for passengers to provide identification except in states with “stop and identify” statutes:
https://en.wikipedia.org/wiki/Stop_and_identify_statutes
The driver is always required to provide identification showing that they are licensed to operate the vehicle. I’m not a lawyer, but generally if state law does not require providing identification when requested by law enforcement (e.g. as a passenger), then refusing to do so does not constitute probable cause. In some jurisdictions, the requirement for identification does not actually require documentation, just that you give your name and address.