Your secret is safe with the algorithm. But human curiosity and observation might still give you away.
Unblocking alone is private. It’s your follow-up actions that might expose you. when you unblock someone on facebook does it notify them
That depends on your situation:
Here’s a catch most people forget.
: If you unblock them on Facebook, they are typically unblocked on Messenger as well, meaning you can both send and receive messages again. Your secret is safe with the algorithm