Add the diced tomatoes, sugar, broth and rind to the instant pot. Secure the top of the instant pot and set the pressure cook setting to 15 minutes. After 15 minutes, use the quick release valve to vent the instant pot.
While the pot releases, grate the Parmesan cheese.
Once the instant pot has vented, remove the top. Use an immersion blender or a regular blender to puree the soup to create a smooth texture.
Add salt and pepper to taste. Top each serving with the grated Parmesan cheese.