Thanks for your quick reply. When I search for "group.com.apple.notes on my external drive" (Time Machine is set to backup here), the folder shows it was last modified on 10/24/24.
When I go to the enclosing folder, click on Enter Time Machine, it just takes me to my MackBook Pro folder. As in your screen shot, I can see the Time Machine on the right side of my screen, but that doesn’t tell me anything about whether my Notes have been backed
Whether or not I’m misunderstanding your suggestion, I don’t know why this is so complicated. All I need to do is confirm my Notes are being backed up. With MS OneNote, you can easily see on your hard drive where the Notes are saved, and just as easily confirm they are being backed up. I don’t know why it’s not as straightforward on a Mac.