I tagged all my 3rd Party Applications with a tag called "Third Party" and then did a search in Finder for all applications with this Tag and saved the search. It seemed to work.
Then I noticed that some preference panes that were third party weren't included. So I removed the "Kind" search criteria and still no preference panes. I checked the Finder sidebar and there is a tag for "Third Party" and it does have the preference panes included.
I tried a new search with Kind = "macOS Preference Pane" but that returned nothing, even though I copied that from a 3rd part Preference Pane's Get Info window.
What is going on?