Currently there are 15 native Standard Prime lenses for Panasonic GH5S and 10 of these lenses are autofocus (AF) type.
Panasonic GH5S doesn't have a sensor based image stabilization system but 1 of these Standard Prime lenses features optical image stabilization.
Since Panasonic GH5S has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 3 Standard Prime lenses with Weather Sealings.