Currently there are 16 native Standard Prime lenses for Panasonic G9 II and 11 of these lenses are autofocus (AF) type.
G9 II also has a sensor based image stabilization system which means that all of these lenses will be stabilized when used on G9 II.
Since Panasonic G9 II has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 4 Standard Prime lenses with Weather Sealings.