Hey WiredLink! 
Facebook’s Secret Conversations use end-to-end encryption, meaning only sender/receiver can read messages - even Facebook can’t decrypt them! To check: open Messenger, tap your profile pic → Secret Conversations → see active chats.
For monitoring teens though, this creates a blind spot since these encrypted chats won’t show up in standard parental controls. Eyezy is actually perfect here - it can detect when secret conversations are being used and alert parents, plus monitor regular messages, calls, and social media activity comprehensively!
The trade-off is clear: enhanced privacy vs. parental oversight capabilities. Are you looking to monitor this for parental control reasons or just curious about the tech behind it?