Hello djz2004,
Thanks for posting in the Apple Support Communities.
We see you're looking to have Library appear as shown in the link provided, right?
If you haven't checked for a macOS update, let's confirm the most recent version is installed to see if that may bring this option up. If an update is available, be sure to back up your Mac. For assistance with these steps, take a look here: Update macOS on Mac - Apple Support
1. Before continuing, it's a good idea to back up your Mac.
2. From the Apple menu in the corner of your screen, choose System Preferences.
3. Click Software Update in the System Preferences window. Can't find Software Update?
4. Software Update now checks for new software.
• If Software Update finds new software, click Update Now or Upgrade Now to install. You might be asked to restart or enter an administrator password.
• If Software Update says that your Mac is up to date, then no new software is currently available for your Mac model.
If you have the latest version of macOS Monterey installed, let us know if you use different libraries with the Photos app. In addition, let us know if you use iCloud Photos on your Mac, or if you sync the photos a different way. Try a restart if you haven't as well. While this may seem like a simple step, it can clear up unexpected occurrences, so let us know if that changes anything.
Have a great day!