To unblock someone on Facebook Messenger, you can use the mobile app or a web browser. Depending on how you blocked them, you may need to unblock their messages specifically or unblock their entire Facebook profile. Unblock Using the Messenger Mobile App
But no official alert is sent.
Once unblocked, they can message you again, but your past chat history may or may not reappear. If it doesn’t, you can start a fresh conversation. how to unblock people on facebook messenger
If you are using a computer, you can manage your blocks directly through the Facebook website. Block someone's profile on Messenger - Facebook To unblock someone on Facebook Messenger, you can
: Tap the name of the person you wish to reach again. Once unblocked, they can message you again, but
The most common way to manage your blocked list is through the Messenger mobile app on Android or iOS. : Launch the app on your smartphone.
After unblocking them on Facebook, they will also be unblocked on Messenger.