Currently there are 27 native Telephoto Zoom lenses for Sony A6700 and 26 of these lenses are autofocus (AF) type.
A6700 also has a sensor based image stabilization system which means that all of these lenses will be stabilized when used on A6700.
Since Sony A6700 has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 25 Telephoto Zoom lenses with Weather Sealings.