Unblocking someone on Facebook is a simple process, but it is effectively a "reset" button. It restores the ability for you two to interact, but it does not restore the friendship status or previous restrictions immediately.
Unblocking someone is more than just flipping a switch. Here are the specific consequences you should be aware of before you hit that button: can you unblock someone on facebook
You can see each other's profiles, public posts, and comments again. Unblocking someone on Facebook is a simple process,
Find the person's name and click the Unblock button next to it. Confirm: Click Confirm to finalize the process. How to Unblock Someone on the Facebook Mobile App can you unblock someone on facebook