One weird thing I noticed at a particular FAANG was that there were many teams that were either overwhelmingly Indian or Chinese. It seemed very unlikely that these could be random, as they were minorities. I made sure to avoid any team like that. Although to be fair it also happens with white people, but at least they are the majority so it seems more likely to occur randomly. I've even overheard certain teams having technical discussions in other languages beside English, which seemed weird because if I was in the team it would make me feel very uncomfortable or excluded.