If you need to see a full cover photo or profile content, the only verified methods are:
While there is no hack, there are ethical (and legal) workarounds to get a better view of a locked profile’s cover photo. fb locked profile cover photo viewer exclusive
There is or legitimate third-party application that allows you to view a full-sized cover photo on a locked profile if you are not friends with that user. If you need to see a full cover
Access management
Several third-party tools and browser extensions claim to allow users to view locked content. : Past profile pictures and cover photos are
: Past profile pictures and cover photos are completely hidden from the public. ⚠️ The Truth About "Exclusive" Viewer Tools
Direct methods to view the "exclusive" or full-resolution cover photo of a locked Facebook profile do not officially exist for non-friends. Facebook's official privacy documentation states that when a profile is locked, only friends can view the full-size cover photo or profile picture. Key Limitations of Locked Profiles