Africans have very little Neanderthal DNA (.3%) compared to Europeans (1-4%).
The little they have is likely from (relatively) modern breeding with Europeans.
Non-Africans are part Neanderthal, genetic research shows
https://www.sciencedaily.com/releases/2011/07/110718085329.htm
I don’t know anything about black lesbians in the WNBA, but if their ancestry is all black, then they are not Neanderthal. Aparently people from Africa show no traces of Neanderthal mixing. Any “black” person with Neanderthal genes got them from a white person.