I tried for months to see one GD plane flying overhead on all the public flight tracking apps.
Depends on the ADS B Code. FAA controllers see everything but the websites only have the ADS B information. If you had a Radar you would get a much larger picture. Also military aircraft will use discrete codes when operating. Depends on the environment. For example aircraft out of Nellis AFB will not show up on the websites, for the most part. Just trying to help. -17 Year USAF Vet.