Only ones that immediately come to mind are Rightful Ownership, which is (obviously) raceplay focused. And the one by Moonbox, which I think was called "Baking with Chocolate" or something like that.
Friends in Need has a black girl as one of the main love interests, and I think at least one other as a later option.
Sisterly Lust has one of the MC's sister's friends, not sure how "main" she is.
Seeking Closure has a black woman, I think she's one of the options you can pick to stay with at the end of the first part.
Limitless is unfortunately abandoned but it has several black love interests (weirdly, all part of the same family that you manage to meet every one of separately in the same day).