SUPPOR YOUR POST WITH FACTS.
Based on how light skinned she is, I doubt her mother was more than 50% African. Her child would be at most 25% African which was referred as “quadroon”. Someone who was half of that or 12.5% African was called “octoroon”.
https://en.wikipedia.org/wiki/Quadroon
https://en.wikipedia.org/wiki/An_Octoroon
They didn’t issue birth certificates or record births in family bibles for slaves on plantations. Lots of female slaves gave birth to children fathered by their masters or other white males. Most of “African Americans” have European and even indigenous American in addition to African ancestors. Based on phenotype, Meghan Markle appears to have quite a bit of European ancestry in beyond just her father.