There were suggestions going back to the 1800s that Charlotte may have had some African ancestry - one writer describing a portrait of her, referred to her ‘mulatto’ features; the idea was suggested again in a 1940s book.
People were basing this entirely on how her features appeared, not on any proof of ancestry.
True or not, it’s not a contemporary ‘woke’ idea, it’s just being used.
Yet in all portraits of her, she is a white European. Go figure.