Many colleges will use only unweighted grades and look at the course rigor, expecting acceptable students to be taking the best their HS has to offer in general (hence not penalizing students whose Hs does not offer as many APs et al). Colleges recalculate gradepoints to fit their criteria- I never did figure out what counted as “academic” for our flagship (gym? art? music?).
Your kids learned how to study and mastered skills and material. This will help them in college and life much more than learning how to game the system. Good advice given to discuss colleges which should be on the radar with the HS guidance counselor. The schools suggested should not limit your kids’ choices but give an idea of how high to reach.