Hello,
just installed Traffic Control with MSFS2020 and just checked KJFK out and i am missing aircrafts..
See the picture for comparison between Fligthradar24 and Traffic Controller
https://i.postimg.cc/jSBY3fXY/grafik.png
The flightplans used are a snapshot of a week in history of that specific company's flights. They are not using live feed data of any kind so therefore they will not match what you see on FR24.