On Sonoma beta 7, if system.login.screensaver is updated to use “authenticate-session-owner-or-admin”, and then Lock Screen is not hiding the macOS Desktop.
Step1. Update system.login.screensaver authorizationdb rule to use “authenticate-session-owner-or-admin”( to get old SFAutorizationPluginView at Lock Screen ). Step 2. Once the rule is in place after logout and login, now click on Apple icon and select “Lock Screen”.
Even after selecting Lock Screen, complete macOS Desktop is visible with no control for the user to unlock the screen. To gain access we have to restart the MAC.