Nikon Z50 has a Nikon Z lens mount and currently there are 48 native lenses available for this mount.
The latest released lenses that are compatible with the Z50 are the Nikon Z 600mm F6.3 VR S, the Nikon Nikkor Z 135mm F1.8 S Plena and the Nikon Z 180-600mm F5.6-6.3 VR.
Nikon Z50 doesn't have a sensor based image stabilization system but 14 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