@Mom2aphysicsgeek - that’s the problem we had with APs and my homeschooler, and I didn’t fool around with it anymore after a struggle trying to find a place for DS to take the AP computer science exam (which ultimately didn’t work out unfortunately). We stuck with dual enrollment instead.
The one downside that I’ve noticed is that the more “elite” schools sometimes give credit for AP where they won’t for DE (many caveats to this idea though). Since DS is probably going to a state school it’s not a big issue for us and it looks like his DE credits will transfer.