Is the Canon EF-M 11-22mm f/4-5.6 IS STM Lens sharp? This page visually answers that question. Shown above are 100% crops from a lab-captured 12mm f/4.5 test image. Observe the contrast and resolution of these results.
Is the Canon EF-M 11-22mm f/4-5.6 IS STM Lens set to 12mm f/4.5 sharper than the Canon EF 16-35mm f/4L IS USM Lens set to 35mm f/16.0? The image quality comparison above also answers that question. Switch between the results to see the sharpness differences between these lenses.