Is the Nikon Z 14-30mm f/4 S Lens sharp? This page visually answers that question. Shown above are 100% crops from a lab-captured 30mm f/4.0 test image. Observe the contrast and resolution of these results.
Is the Nikon Z 14-30mm f/4 S Lens set to 30mm f/4.0 sharper than the Sony FE 16-35mm F4 ZA OSS Lens set to 20mm f/4.5? The image quality comparison above also answers that question. Switch between the results to see the sharpness differences between these lenses.