IB Physics is a bit odd, since they are writing research papers etc rather than “just” learning the concepts and testing. In her case, AP physics 1 acted as the intro class, but I think they will let kids take it without having AP physics first, now that it is integrated into the school curriculum. https://www.ibo.org/globalassets/new-structure/programmes/dp/pdfs/physicshl2016englishw.pdf
Yes, UofU is a great option for physics, but she really wants to go out of the state.