I just found this piece in the Guardian, contributed by Nadifa Mohamed, a fellow republican, which is why it chimed with me:

"As Meghan has learned, the monarchy is still built on breeding, ancestry and caste"

A couple of quotes from it:

"It is painful for me, as a republican, to have to step out in defence of any member of the royal family but I feel as though Meghan, Duchess of Sussex is receiving the ire intended for a much larger target of young Black women who have stormed into previously closed-off institutions...."

"...The conversation between Meghan and Oprah is fascinating because of the frank way they talk; a huge, global audience watches as two Black women discuss the outrageous experiences of one of them and hear all of the gory, suppressed details for the first time. Oprah gasps as she hears what Meghan and Harry have had to put up with.

An ancient British institution tamed by an unprecedented level of public scrutiny from two world-famous Black women. I never expected to see it, the silenced becoming the silencer."