Meta are based in Menlo Park. Many senior engineers leave when they have kids because the commute is terrible. They have every incentive in the world to make remote work.

That being said, Facebook (when I was there) was a difficult place to work remotely from as it was a super in-office culture. I was essentially remote (not in the same office as most of my team) and it was very hard, so maybe it's more cultural factors that are causing the problems for them.