It seems that flat-earth believers deny the existence of satellites, which means all global navigation system satellites (GNSS) including the American GPS satellites (at 20,000 km altitude), all geostationary satellites (at 35,000 km altitude) and all low earth orbit TV transmitting satellites (around 300 km altitude). The elephant not in the kitchen but in space is the largest of satellites, the International Space Station (ISS), the largest man-made structure in space. It orbits at an altitude of about 400 km, which is well outside of the atmosphere.
The ISS can be seen from the earth’s surface with the naked eye, when it passes overhead on a 90 minute circumnavigation of the planet, travelling much faster than stars move. It looks like a fast-moving plane only much higher and traveling thousands of kilometers an hour faster. When it comes into view in your area it is best viewed within two hours of sunset or sunrise. Because of the very large solar panels, used to power the spacecraft, sunlight can reflect off those in your direction.
Here is a live video feed from the ISS. But flat-earthers say that all such video is faked. They say that all space agencies fake everything they show. So you can’t win.
NASA has it own TV showing live feeds from the ISS when available. Below is a YouTube recording of a past live feed.