There are already 3,000 Starlink satellites up there, with a further 9,000 to follow, taking the total to 12,000. A possible later stage in the programme might see that number upped to 42,000 though.
Geostationary satellites, which remain in s fixed position relative to the Earth's surface, need to be about 22,000 miles above the Earth. (The Astra group of satellites, which beam Freesat and Sky programmes down to us are geostationary). So they're not easy to spot. However Starlink satellites are in a low orbit over the Earth, at at height of only about 342 miles, so they're much brighter in the sky. Their purpose is to provide internet services, rather than for TV.