How state maganagement pattern like Redux or Vuex, work in big-enterprise apps?

Hello everyone, how y'all doing? Enjoying the World Cup (I'm not)?

It's been sometime since I first read about stores and state management pattern. Apparently the pattern solve big problems and is designed for large and complex systems, but I can't imagine how that actually works in a real world scenario, like Airbnb.

Do they have a giant javascript file that stores the user, the experiences, the houses and stuff like that? Or is it separated into several pieces?

It would be really good to comprehend how state management works in apps like those.

Thank you. :D