CurlewKate
To choose one example- the "exaggerated, sneering curtsey". Now, I haven't seen it, but I did read that it was her showing the difference between how she, as an American, perceived a court curtsey and what was actually expected of her. So. Who knows?
Then might I suggest that you take the trouble to see this clip? It's one of the most notorious and talked-about bits of the Netflix series, and a massive misjudgement by Meghan. Even Harry looks utterly mortified. His face tells its own story.
If you really haven't seen it, you must be in a very small minority!