Really??? Your basis for denying the existence of trackable satellites, including the highly visible ISS is that you personally haven't seen one.   https://www.satflare.com/track.asp   Radio Hams all around the world connect with satellites routinely. Companies own their own one and use it for purpose. Weather satellites, FFS sending real time pictures down continuously!     A thousand facepalms at that! Astronomers track, photograph and sequence things