One way to tell if you’ve been blocked on Facebook Messenger is to see if you can still see the person’s profile picture and name when you send them a message. If you can’t, then you’ve likely been blocked. Another way to tell is to try sending the person a message and see if you get an automated response that says the person is unavailable.
Video – How To Tell If You’Re Blocked On Facebook Messenger
If you’re not able to see your Facebook friend’s profile picture, name, and message when you send them a message, then you’ve been blocked.