Canon R6 III has a Canon RF lens mount and currently there are 104 native lenses available for this mount.
The latest released lenses that are compatible with the R6 III are the Brightin 14mm f2.8, the Canon RF 20-50mm F4 and the Brightin 11mm F2.8.
R6 III also has a sensor based image stabilization system that is up to 8.5-stops effective which means that all of these lenses will be stabilized when used on the R6 III.
Since Canon R6 III has a Full frame sensor, it has a focal length multiplier of 1× so lenses will provide their original focal length on R6 III.
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Canon R6 III Lenses with Image Stabilization
Canon R6 III Lenses with Weather Sealings