I’ve known half or partly-Black people who were almost albino, in terms of skin, hair, eyes. But they still had features that could be seen subjectively as ‘African’.
It’s interesting to me that someone would find that a portrait of the Queen contemporary with her times,might be seen as suggesting African heritage - especially as portraits of royalty were often somewhat ‘idealized’, just as celebrity photos are often manipulated today.
There is absolutely NOTHING to suggest that either Queen Charlotte or Cleopatra were in any way black, descended from or had any Black Africans in their families - NADA, ZIP, NEVCHEVO.