There is no image. The site earns $2 to $5 per survey completion. You will waste 15 minutes entering personal details, receive a blurry pixelated mess, and then get spammed with robocalls.
Facebook introduced the Lock Profile feature to give users more control over their digital footprint. When a profile is locked: fb locked profile dp viewer
None of them work.
Beyond the security risks, attempting to view a locked profile picture has consequences. There is no image
The Illusion of Access: Understanding "Facebook Locked Profile DP Viewers" receive a blurry pixelated mess