Pomona’s AP policy is listed at
https://www.pomona.edu/admissions/learn-more/admitted-students/advanced-standing
Looks like AP can count up to two course units toward the number needed to graduate, but unlimited subject credit and advanced placement where allowed by the departments.
Students and parents should be aware that even if AP credit toward courses or credits needed to graduate is limited or not given, the subject credit and advanced placement from AP scores may still be useful. So the student may not be able to graduate early, but may be able to take additional electives of interest instead of lower level requirements.