First, as I think I already stated, each child is an individual. Maybe the OP’s child is in that very small group that NEEDS to accelerate, maybe while still gifted by various definitions, should not take 7th grade algebra.
Next- not all college calculus courses are the same. AP represents an average college, not a top tier one for content expected to be mastered. Very common for UW (Madison) freshmen to start with first semester calculus despite “passing” the AP exam because they will be unprepared to do well with second semester as taught by UW ( a top tier school for grad math). Post #47 key word is “basic”. The versions offered at top tier schools are not basic (just as honors is not regular as well). Likewise for many other fields.