Respectfully: who cares? When I go to Vercel (or any React project), I don't wonder if the company is from Meta.

Lottie is open source, it's been spun off from Airbnb (https://medium.com/airbnb-engineering/continuing-our-support...), and while I agree that the questions at the end of your post are valid, I don't think putting more "about them" is how to answer them - afaik where your 'data' is going has nothing to do with where the founders worked/lived.