A: Yes. Unblocking restores their content to your view (comments, likes, tags) as if the block never happened.
But when you open Messenger, you can’t find the button anywhere. Don’t worry—you’re not losing your mind. Facebook Messenger does not have its own unblock feature. how to unblock from facebook messenger
TL;DR: You cannot unblock someone directly inside the Messenger app. You must unblock them in the main Facebook app (or Facebook website). Once unblocked, old messages may reappear, but you will not get back messages sent while they were blocked. Introduction We’ve all been there. In a moment of frustration, you block an ex, a friend, or a chatty group member on Facebook Messenger. Weeks or months pass, tempers cool, and you want to reconnect. A: Yes
A: Facebook does not send a notification. However, they may notice if they try to message you and suddenly it goes through. Don’t worry—you’re not losing your mind