Which companies do use backend for frontend(BFF) to solve which problem they faced specifically?

I am new to BFF pattern. I did my research and understood well.

1. I would like to know what are the famous companies did incorporate BFF in their application architecture and what problem they solved with it? ex: Netflix, but I'm not sure which problem exactly they solved using BFF. BFF will give many benefits. So it can be used to solve many problems, that's why I want to be sure about the problem they solved with it. I expect at least you discuss about 3 companies.

2. Can GraphQL completely replace BFF?