There are a few students with this profile at the Phoenix NOVA School in Fairfax City. It's a pretty new, inclusive K-8 private school. The directors are great about meeting with prospective student families and discussing your child's specific needs. While they do have some students who attend with ABA support, they do not use ABA practices school wide and I have observed students with a PDA profile thriving there.
https://www.phoenixnovaschool.com/