Canon R5 has a Canon RF lens mount and currently there are 17 native lenses available for this mount.
R5 also has a sensor based image stabilization system which means that all of these lenses will be stabilized when used on R5.
Since Canon R5 has a Full frame sensor, it has a focal length multiplier of 1x so lenses will provide their original focal length on R5.
You may also also be interested in these:
Canon R5 Lenses with Image Stabilization
Canon R5 Lenses with Weather Sealings