I really think your daughter needs to do some AP classes. She is at a disadvantage as a homeschooler if she has none. I agree that if the trip to Mexico can be rescheduled, it should be.
Advantages of taking APs as a junior are that it shows mastery of a subject, good results can be used for credit at many colleges (which means getting through college more quickly, saving money,) and it’s a standardized test which shows that she has has rigorous standards. She is more likely to get in to colleges with some AP scores under her belt. While APs taken in senior year can be used for college credit also, it’s too late for the college application process. You might want to post in the homeschooling forum for more advice.