Fujifilm X-S20 has a Fujifilm X lens mount and currently there are 93 native lenses available for this mount.
The latest released lenses that are compatible with the X-S20 are the Rokinon 8mm f2.8 Fisheye, the Viltrox AF 56mm f1.7 XF and the Meike 55mm f1.4 AF.
X-S20 also has a sensor based image stabilization system that is up to 7.0-stops effective which means that all of these lenses will be stabilized when used on the X-S20.
Since Fujifilm X-S20 has a APS-C sensor, it has a focal length multiplier of 1.5x so you have to multiply lenses original focal length with this multiplier to find the Full Frame equivalent focal length of the lens when mounted on X-S20.
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Fujifilm X-S20 Lenses with Image Stabilization
Fujifilm X-S20 Lenses with Weather Sealings