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It sounds like you want to find out what is now missing by comparing it with other backups. The Restoring data from Time Machine backups section explains how you can do that.
Mac Basics: Time Machine backs up your Mac
You can use the timeline on the right side of the window to reach a certain point back in time. The timeline shows the times of all backups on your backup drive. If you don’t know exactly when you deleted or changed a file, you can use the back arrow to let Time Machine automatically travel through time to show you when that folder last changed.
Have a nice day,