Currently there are 21 native Standard Prime lenses for Fujifilm X-T3 and 14 of these lenses are autofocus (AF) type.
Fujifilm X-T3 doesn't have a sensor based image stabilization system and none of these lenses have optical Image Stabilization.
Since Fujifilm X-T3 has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 6 Standard Prime lenses with Weather Sealings.