Wait she called them? IF that is true it would explain why she seems so out of place with the rest of the line up.
They've been doing that since their first "engagements" of this type. It's why the 19th in August had Hillary Clinton, Kamala Harris, Susana Martinez, Catherine Cortez Masto, Tammy Duckworth etc and Meghan, Duchess of Sussex. The organiser openly said Meghan called and asked to be a part of it.
It's not a bad thing per se, networking is the lifeblood of Hollywood, but it shows in the other guest list. It might have been different if she'd actually been DoS for longer like Melinda Gates has been a billionaire philanthropist for decades partly because she's married to one.