slights - If you don’t know what you talk about then you should not give advice. Nothing is accredited by the College Board. Everyone can take AP exams as long as that person pays the fee to the CB. People can self study and take AP exams.
OP - Many colleges accepts online classes and homeschool classes. Some colleges don’t allow students to use online classes to fullfil basic HS requirement (they do accept online classes that belong to their system - Univ of California is an example). AP classes are not required classes though. Stanford accepts EPGY AP classes. Most selective colleges know EPGY AP classes. EPGY provides transcript to colleges.
My son took EPGY precalculus and EPGY calculus A in 8th grade then he took the rest of the calculus sequence in his HS. He said his HS classes were not as rigorous as EPGY classes. Remember EPGY classes are for advanced students. Your success in EPGY classes depends on your discipline and your willingness to ask your tutor. The first one or two chapters are always easy in most classes. But if you have a strong ability in math then AP Physics C is not hard. The EPGY AP Physics requires EPGY Calculus B as prerequisite.
EPGY Calculus A deals with differentiation and derivatives. EPGY Calculus B deals with integration.