Among the Big 3 of ID vtubers agency (HoloID, NijiID, and Maha5), Maha5 is the one that's having a most unique kind of fans. Somehow they could attracts a lot of teenage weebs who doesn't know the existence of other vtubers. Being a teenagers, a lot of them haven't be able to understands English. So whenever they found out about HoloID who speaks a lot of English, they got gatekeeped, sometimes they would directly confront the girls to speaks Indonesian because they're Hololive Indonesia.
It's just my own humble opinion, but I think the HoloID management also wanted to bring them into the fandom. Maha5 is no joke, their most subbed vtuber is a male with 450k subs, more than Risu, and almost all of them are Indonesian.
And about the local partnership, I've seen NijiID and Maha5 in local news, albeit it's just a few articles, but I've never seen any news about HoloID. It seems like the HoloID are already out of touch with their local market and maybe they want to get back to their roots to monetize their popularity locally.