I’d add account details (including profile pic), platforms being used, IP addresses, and linked accounts (including phone #) to that list. E2E protects your messages from interception, but literally everything else is fair game.

"we kill people based on metadata"

https://www.youtube.com/watch?v=PxwEwwlDM8Q

I wish Facebook was a lot more clear about what it shares and when. People need to be aware of what information exposure they have to digital platforms.