https://www.topdrawersoccer.com/commitments/club/index.jsp
Granted this is not the best source just they only one available. Not all of the girls are on the same teams and not all commits are listed. But looking at 2019’s DA/ECNL clubs show 130 commits in SoCal (I know Legends doesn’t have 25 girls playing DA) while other clubs have 14. Rebels has 5 of the 14. That’s 90% of the reported commits.
My guess is that the families that chase DA and ECNL are more likely to post this kind of stuff on topdrawersoccer - not a representative sample.