Currently there are 5 native Telephoto Prime lenses for Canon R and 4 of these lenses are autofocus (AF) type.
Canon R doesn't have a sensor based image stabilization system but 2 of these Telephoto Prime lenses features optical image stabilization.
Since Canon R has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 2 Telephoto Prime lenses with Weather Sealings.