Fiction based on fact.
I watched the original Bridgerton series, and enjoyed it for what it was, for the most part. This spin-off has a title card saying the story is fiction based upon fact.
While Bridgerton was cast color blind, this series is less so. There is only the hint of racism in the script regarding Lord and Lady Danbury's efforts to be accepted into the ton and the King's mother's attempt to help.
I think the producers missed an opportunity to cast a better actress for Charlotte. It would have been more interesting to cast a German actress with dark skin as Charlotte. The real Charlotte only learned to speak English after her marriage and spoke with a German accent thereafter.
https://en.wikipedia.org/wiki/Charlotte_of_Mecklenburg-Strelitz