If you routinely perform mac forensics, you’ve probably done a few macOS Catalina (10.15) examinations already. And if you are the kind that verifies your data, you may have noticed that for ScreenTime notifications the databases don’t show you the same strings that you see in the actual displayed Notification and several forensic tools don’t either.
Source: Yogesh Khatri’s forensic blog: Screentime Notifications in Catalina (10.15)