The internet is full of "exclusive" tools promising to bypass Facebook's security. When a user activates the feature, Facebook severely restricts what non-friends can see to protect against stalking and identity theft.
If you need to see a cover photo that is still public (even on a restricted account), these are the only safe methods: Lock your Facebook profile | Facebook Help Center fb locked profile cover photo viewer exclusive
When someone locks their profile, Facebook applies a "limited view" for anyone not on their friends list: The internet is full of "exclusive" tools promising
If you are looking for an "FB locked profile cover photo viewer," it is vital to distinguish between legitimate viewing methods and risky third-party scams. What Happens When a Profile is Locked? What Happens When a Profile is Locked
: Using automated scrapers to access private data violates Facebook's Terms of Service. Legitimate Ways to View Public Content
: Past profile pictures and cover photos are completely hidden from the public. ⚠️ The Truth About "Exclusive" Viewer Tools
: Many of these sites require you to log in with your own Facebook credentials, which can lead to your account being hacked.