Previously Imported Photos no longer in Catalog (apparently) but also show as already imported
LrC 12.0.1
Windows 10.0.19044
While revisiting a folder from 2019, I noticed some of the pictures were not showing up in Library View (with filters off). Checking the folder in Windows Explorer, all the "missing" DNG files are still in the folder.
The Integrity Test runs clean.
Selecting All Photos and running a search on one of the "missing" files comes back No Match Found.
However, attempting to reimport the files they show as greyed out, already imported files.
I suppose I could force them to re-import but then I suspect I'll lose my edits (I thought they were saved to the DNG file but just learned I should've been using "Update DNG Preview & Metadata").
So, it seems like some of the information is in the catalog. Any ideas on how to recover it?
Thanks.