Nikon Z9 has a Nikon Z lens mount and currently there are 184 native lenses available for this mount.
The latest released lenses that are compatible with the Z9 are the Tamron 12-20mm f2.8, the Viltrox 26mm f2.8 Z and the SG-image AF 35mm f2.2.
Z9 also has a sensor based image stabilization system that is up to 6.0-stops effective which means that all of these lenses will be stabilized when used on the Z9.
Since Nikon Z9 has a Full frame sensor, it has a focal length multiplier of 1x so lenses will provide their original focal length on Z9.
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Nikon Z9 Lenses with Image Stabilization
Nikon Z9 Lenses with Weather Sealings