Megan in some respects is a modern version of this
The Buccaneers by Edith Wharton
https://en.wikipedia.org/wiki/The_Buccaneers
But with a very important exception! Meagan Markle is the gold digger not penniless titled British aristocrats. The goal is still the same “Gain social legitimacy through an aristocratic title!”.
Her childhood friend said Meghan wanted to become a princess. That ex friend was another who wasn’t invited to the wedding. Aside from her mama, the only people on her side of the church were a few celebrities. No friends or family which is very telling.