I tend to only work stations on LOTW. I assumed most would get confirmed within a reasonable time.

I had worked a station in a county I really need. Upon investigation, I found a CSV file available
from LOTW that has the last activity date/time for all stations. Seems about 2 weeks behind but definitely useful.
Perhaps this is the same file you use?

https://lotw.arrl.org/lotw-user-activity.csv

WSJT-X also uses that URL to populate it's database.

Alas, the station in question has not uploaded in 6 years.

Now to the enhancement. In the membership form, it could display the date of last activity from that file.

Thanks & 73s,
Don