Open the Facebook app or website
Go to your profile
Tap or click the three dots next to Edit Profile
Select Lock Profile
Tap or click Lock Your Profile to confirm
If you do not see Lock Profile
Go to Settings and Privacy
Open Settings
Check your country or account availability
Use the profile lock feature only if it is available in your region
To unlock later
Go to your profile
Tap or click the three dots
Select Unlock Profile
Confirm the change