Leica SL has a Leica L lens mount and currently there are 65 native lenses available for this mount.
The latest released lenses that are compatible with the SL are the Sigma 17mm F4 DG DN C, the Sigma 50mm F2 DG DN C and the Leica SL 100-400 f5-6.3.
Leica SL doesn't have a sensor based image stabilization system but 10 of these lenses already comes with optical image stabilization.
Since Leica SL has a Full frame sensor, it has a focal length multiplier of 1× so lenses will provide their original focal length on SL.
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Leica SL Lenses with Image Stabilization
Leica SL Lenses with Weather Sealings