Meghan is the only descendant of African slaves to marry into the UK royal family that, historically, benefitted greatly from that trade.
She is the only person of colour in a family that claims that the head of state of several overseas realms and Commonwealth countries (all of them former colonies in which black people were considered second class citizens) must be the first born child from a white family chosen by God, and God here means the God of the Church of England. Her children are the only persons in history who are descended from African slaves while also being descended from several kings and queens.
It is a remarkable story, and you would have to be pretty unimaginative not to see that from all perspectives, hers and Harry's is a story layered with meaning. Her entry into the Royal Family, and her departure interests all sort of academics, from historians to sociologists. Add in the existence of online hate against her, including the endlessly threads on Mumsnet and you have an embarassment of riches. Toss in the conspiracy theories that are meant to remove two slave descended toddlers from the line of succession (theories repeated in this very thread) and the conspiracy theories associating her and her mother with criminal activity for no reason than their blackness and you have several academics' wet dreams.
From the University of Warwick, a discussion before the wedding in which four academics did a short piece on the four perspectives around it (historical, business, etc)
https://warwick.ac.uk/newsandevents/knowledgecentre/society/sociology/royalwedding/
Two academics wrote a book looking at Meghan from the lens of systemic racism.
https://www.amazon.co.uk/Revealing-Britains-Systemic-Racism-Meghan/dp/0367765411
An academic from Goldsmisths wrote this piece.
https://www.britsoc.co.uk/about/latest-news/2018/may/a-hostile-environment/
There is also a lot of work around the being done in media studies, especially around misinformation, the influence of the tabloids, and the role of Internet forums in spreading online hate. Look up Meghan Markle, disinformation, sociology, hate groups.
My particular interest is the online hate from middle-aged white women like Sadie Quinlan and Samantha Markle, women who spread conspiracy theories while monetising their obsession on YouTube. It's a fascinating model of hate for profit.
More on Sadie Quinlan here. https://www.britsoc.co.uk/about/latest-news/2018/may/a-hostile-environment/
This is just what I found in 5 minutes, there is a lot more.
Enjoy.