Honestly that kind of the same for most of DCs Black Characters.
I mean look at Black Lightning, his only villain is Tobias Whale and his only supporting cast of note (unless they bring Peter Gambi back to live) are his wife and his daugthers.
And the daugthers were retroactively created as characters for Outsiders and JSA and were never part of his solo stories, so doesn't even has much of an established history with them ...