I need to identify an aircraft seen at 36.841900,-87.673600 Kentucky on July 4, 2020, at 12:29am.
I recommend using flightradar24. In addition to its many other features, it has a playback mode. I'm not sure if there is a simple way to view a specific coordinate; however it should be easy enough to navigate to your desired location using the map view. If looking at coordinates is a must, I have found that you can put them after the url like so:
According to Jan Hudec, you need a flightradar24 subscription to access dates this old.