Sony A9 II has a Sony E lens mount and currently there are 363 native lenses available for this mount.
The latest released lenses that are compatible with the A9 Mark II are the Tamron 12-20mm f2.8, the Viltrox 26mm f2.8 FE and the SG-image AF 35mm f2.2.
A9 Mark II also has a sensor based image stabilization system that is up to 5.5-stops effective which means that all of these lenses will be stabilized when used on the A9 Mark II.
Since Sony A9 II has a Full frame sensor, it has a focal length multiplier of 1x so lenses will provide their original focal length on A9 Mark II.
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Sony A9 II Lenses with Image Stabilization
Sony A9 II Lenses with Weather Sealings