You’re absolutely right on your second bullet point: DD is taking the AP Exams in conjunction with the IB Class, not as a separate class. I hadn’t made that distinction. For example, she’s slated to take IB Math and will take the AP Calc BC exam (but not a separate class).
She’s doing the IB full Diploma course. She probably will want to do PPE as a major, but she’s not currently considering any of the schools you mentioned in her last bullet point.
I am encouraging her to go wherever she is happy. I’m pretty fed up with the admissions process to date. DD is a first-rate student and doing a lot of good work in sports and stuff outside of school. It’s going to be totally her choice as to schools. No doubt the Ivies and the HYPSM and T-20 (or whatever the acronyms are for admissions currently are), plus the UC system colleges are ones she’s considering. But we are encouraging to look long and wide, including international universities.