Currently there are 41 native Telephoto Prime lenses for Nikon D850 and 35 of these lenses are autofocus (AF) type.
Nikon D850 doesn't have a sensor based image stabilization system but 13 of these Telephoto Prime lenses features optical image stabilization.
Since Nikon D850 has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 18 Telephoto Prime lenses with Weather Sealings.