Earlier quoted context omitted.
This particular level and visibility of sky writing is new, but "drawing things in the sky" dates back to the 1920s or so. That sort of skywriting uses oil to cause the airplane to leave a trail of white smoke, visible against the blue background of the sky. The precision we see in this route is fairly new, but, especially on proving flights for new aircraft, which needed hours and hours of flight time and would take…
I'd say this is a very different type of drawing, because you only see it on a tracker. Someone watching in real live from the ground wouldn't see the pattern, because I don't think jet trails stay in the air for two hours. This seems more like people using run/cycle trackers to make drawings on a map. (Strava Art)
Also this paper https://www.mdpi.com/2226-4310/7/12/169