Here is an example. Any flight I try seeing the route it doesn’t show up. Because of this it won’t show up on that infinite flight website for flight plan.
This is a known issue and there’s nothing wrong with it. Usually, only flights to/from/within the United States, Canada, Mexico and Australia have the flight plan shown.
Additionally this is the Infinite Flight forum. FlightAware is unrelated. This question/concern would have been better situated on Google or another related online forum. But Mr. Bouncy is correct. You’ll only see North American flight plans.