Turn the Instant Pot to the sauté mode. Add the ground beef and cook until browned, about 5-7 minutes. Make sure to crumple the beef with the spatula as it cooks. Drain excess grease if necessary.
Add the diced onion and minced garlic to the pot, cooking for an additional 2-3 minutes until the onion becomes translucent.
Stir in the diced potatoes, carrots, corn, beef broth, Worcestershire sauce, mustard, onion powder, paprika, salt, and pepper. Mix everything well.
Seal the Instant Pot lid and set the valve to sealing. Select the manual or pressure cook button, and cook on high pressure for 10 minutes.
Once the cooking time is complete, carefully release the pressure using the quick release method. Open the lid once the pressure is fully released.
Stir in the heavy cream and shredded cheddar cheese until melted and smooth. Adjust seasoning if needed.
Ladle the soup into bowls and garnish with sliced green onions.
Notes
Adjust the seasoning to your taste and use your favorite cheese.