I did not see the questions they asked me in the FB leetcode questions, but they were very similar to questions I had seen. I've heard anecdotally that FB rips a lot of their questions straight from LC.
The same shit happened with doordash where they just put me down for a senior position and I am like a mid level right now . ( I am sde 1 in Amazon ! ). Then I thought I aced my take home but they came back to me and said - fuck off. The hiring is really broken in every company , big or small. Dont Recruiters have just one job todo