Yes Apple forces everyone through webkit and won’t allow third-party blockers. Brave on iOS was forked from Firefox anyway, and iirc uses the same API to block ads as Firefox Focus. Google is most definitely not involved, particularly because both block YouTube ads (and is my primary reason for using Brave anyway).
I’m not sure what you’re referencing in regard to VPN usage; I have had zero problems with mine.
Clearly he should rename threads to Z.