Had the initial screening for FB, US and cleared it. The interviewer was from Switzerland and was very nice.
He clearly explained that the 40 mins of time would be used to answer 1 and if possible 2 coding questions and that it is ok and nothing for me to worry about if I was unable to complete the second problem. The 2 questions asked were :

https://leetcode.com/problems/squares-of-a-sorted-array/
A small variation of : https://leetcode.com/problems/random-pick-with-weight where the weights would be provided in a different array.

Also a good emphasis on the time and space complexities was there.

Edit : Sharing my product design interview experience here : https://leetcode.com/discuss/interview-question/1632311/FacebookMeta-or-VO-or-E5E6-or-Product-design

Edit2 : Coding inteview exp : https://leetcode.com/discuss/interview-question/1666651/Facebookor-Meta-or-Virtual-Onsite-or-E5E6