Currently there are 3 native Macro Prime lenses for Canon R5 and 2 of these lenses are autofocus (AF) type.
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 environmental sealings (Weather Sealing), you may like to couple your camera with one of these 1 Macro Prime lenses with Weather Sealings.