I'm not sure what evidence you'd expect to see of her being particularly academic given her line of profession?
I admit we can't judge or know really.
But she gives the impression of being poor at concentrating on anything. You can see when she's called up to talk to people - either officials or members of the public - her eyes flicker and she just cannot focus on what's being said to her. Similarly - when she's in an audience for sport of other events, she cannot sit still and just concentrate. There are well-documented cases of this, one when she sat by the Queen at the Braemar Gathering. The Q sits quietly, respectfully paying attention to the Games, but Meghan just cannot do that. She fidgets, she plays with her hair, she chatters to the Queen (who completely ignores her and continues to stare ahead...er, read the room, Meghan - but she doesn't).
And I'm sure that if Meghan had any intellectual interests we'd know about them. She's such a self-publicist that if she were a keen reader, or devoted to the theatre, opera or art - we'd see them at these cultural activities.
But no - all we see is her jigging about at a Beyonce concert. So I'm very sceptical about her academically. I know people myself who would score well on an IQ test but who are totally unintellectual, and I think she falls into that category.