: Facebook's servers verify your relationship with the target user before delivering data. A third-party website has no way to "force" the server to send private data it isn't authorized to access.
Should I even answer a locked profile? : r/FacebookMarketplace facebook locked profile viewer online link
Facebook's privacy architecture is robust and has been built specifically to prevent the kind of third-party access these tools claim to provide. The only gatekeeper to a locked profile is the owner of that profile. You either befriend them, or you respect their privacy. : Facebook's servers verify your relationship with the