Is the Sony FE 24-240mm F3.5-6.3 OSS Lens sharp? This page visually answers that question. Shown above are 100% crops from a lab-captured 240mm f/7.1 test image. Observe the contrast and resolution of these results.
Is the Sony FE 24-240mm F3.5-6.3 OSS Lens set to 240mm f/7.1 sharper than the Sony FE 70-300mm F4.5-5.6 G OSS Lens set to 135mm f/5.0? The image quality comparison above also answers that question. Switch between the results to see the sharpness differences between these lenses.