To answer your question, when I click on the shortcuts to these files I get the error that it's missing and or moved:
Previously I've done a search through my entire Windows drive for these files, thinking that I might've moved them around. But the only files that show up are the ones in 2 different "recent" locations. The shortcuts for these files in "C:\Users\tmckernan\Recent" and "C:\Users\tmckernan\AppData\Roaming\Microsoft\Windows\Recent" both point to this missing dropbox folder. See the pic for the list of Recent shortcuts to missing file locations.
Regarding the events page and search bar on dropbox.com - no, I cannot locate the files in the search bar or in the events.
OK, I have the basic plan and I see that my dropbox file history goes back 30 days. These files were last modified in April, 2020, so there's too much time for me to that history, nor do I remember enough to say definitively what I did or didn't do.
Thanks for your help, everyone. I'll just chalk this up to a combination of not having enough history to restore, plus PEBKAC since I can't remember what I did.