Is the Canon RF 85mm F2 Macro IS STM Lens sharp? This page visually answers that question. Shown above are 100% crops from a lab-captured 85mm f/2.8 test image. Observe the contrast and resolution of these results.
Is the Canon RF 85mm F2 Macro IS STM Lens set to 85mm f/2.8 sharper than the Rokinon (Samyang) AF 85mm F1.4 Lens for Canon RF, Sony E set to 85mm f/2.0? The image quality comparison above also answers that question. Switch between the results to see the sharpness differences between these lenses.