Nikon Z50 has a Nikon Z lens mount and currently there are 15 native lenses available for this mount.
Nikon Z50 doesn't have a sensor based image stabilization system but 2 of these lenses already comes with optical image stabilization.
Since Nikon Z50 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 Z50.
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Nikon Z50 Lenses with Image Stabilization
Nikon Z50 Lenses with Weather Sealings