I'd be interested in one, too, provided we're careful not to let it become like some support subreddits did where people in pain ended up venting to each other in circles, nobody knowing how to help, and all just feeling worse (I don't think r/cptsd in particular had gotten this way, though. I just mention it as a potential risk to watch out for, for the neurodivergence hive too maybe.)
Anyway, I think CPTSD posts should be welcomed here in the meantime, imo.