Why do you think the British Royal Family press teams might want us to forget that true history? Shouldn’t it instead be celebrated that there were people of colour in the royal family before Meghan? Why is the history hidden? What happened to the non-white royals who came and went before Meghan?
There's a big difference between Victoria welcoming people of colour from GB's colonies and assimilating them totally into c19th Britishness at the expense of their heritage and culture to the heir's son marrying a bi-racial woman.
Can you really not seen how these individuals were victims of colonialism?
Queen Charlotte may have had non white ancestry but if she did, it was with enough degrees of removal to make it unlikely that she took after them physically. Personally, I've always been inclined to think that the claims of her being a person of colour were unfortunately an example of racism and the age-old tradition of tearing women down if they don't conform to narrow beauty standards.
There isn't any reliable evidence that she was a person of colour and contemporary comments on her skin are steeped in the language of sexism and racism.
All the examples you give are, in my opinion, an attempt to 'colour-wash' the history of the Royal family so they can separate themselves from their colonial, elitist past.
It's really not a stretch to believe that Meghan encountered racism within the Royal family, even if it was 'unconscious', where they exist within a peer group of people who are raised to believe they are superior to everyone else and where these inherited beliefs are often given away by behaviour and attitude even if intellectually they know them to be untrue.