Honors Chemistry/Physics is not physical science course (her school also offers that for non-IB students). It’s a lab based one semester each of chemistry and physics to specifically prepare potential IB students for IB chemistry or physics.
Yes @ucbalumnus she unfortunately must take IB Math HL for the full diploma even though there is heavy overlap with both Calc BC and Stats and there will be no additional credit given by anyone.
I think the Physics will prepare her better, but it will definitely be a heavier load than Psych.
Thanks for the thoughts - she has a few more weeks before she has to submit her proposed schedule and even then it may not matter as she may find conflicts between classes anyway.