Canon M5 has a Canon EF-M lens mount and currently there are 29 native lenses available for this mount.
The latest released lenses that are compatible with the M5 are the Samyang MF 85mm F1.4 Mk2, the Samyang MF 14mm F2.8 Mk2 and the Kamlan 50mm F1.1 II.
Canon M5 doesn't have a sensor based image stabilization system but 6 of these lenses already comes with optical image stabilization.
Since Canon M5 has a APS-C sensor, it has a focal length multiplier of 1.6x 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 M5.
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Canon M5 Lenses with Image Stabilization
Canon M5 Lenses with Weather Sealings