Highly selective schools are usually the most stingy with giving AP credit. I would bet many schools will get even more restrictive going forward since so much of the school year was on line and they want their college students succeeding.
I get you are disappointed but I would move on. College Board is not going to change the score. Chock it up to another opportunity to teach resiliency after disappointment. (Which feels like we’ve all had lots of practice with this year).