Currently there are 5 native Wideangle Fisheye Prime lenses for Panasonic G85 and 2 of these lenses are autofocus (AF) type.
G85 also has a sensor based image stabilization system which means that all of these lenses will be stabilized when used on G85.
Since Panasonic G85 has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 1 Wideangle Fisheye Prime lenses with Weather Sealings.