Before unblocking someone, ask yourself why you blocked them in the first place. If it was due to harassment or toxicity, consider whether unblocking them will invite that negativity back into your digital space. There is nothing wrong with keeping a block permanent to protect your peace of mind.
Tap your Profile icon > Settings (Gear icon) . Scroll down to Account Actions (or Privacy Controls) and tap Blocked . Tap the X next to their name to unblock them. 2. How to Unblock on Messaging Apps
Open the Facebook app, tap the Menu (three lines), and go to Settings & Privacy > Settings . Scroll to Audience and Visibility and select Blocking to manage your list.