Open Facebook and tap your profile picture (top right)
Go to Settings and privacy
Tap Settings
Tap Blocking (or Privacy → Blocking)
Find the person under Blocked people
Tap Unblock next to their name
Confirm by tapping Unblock again
Open Facebook and tap your profile picture (top right)
Go to Settings and privacy
Tap Settings
Tap Blocking (or Privacy → Blocking)
Find the person under Blocked people
Tap Unblock next to their name
Confirm by tapping Unblock again