Cut the cauliflower into bite-sized chunks and place them in the bottom of the Instant Pot.
Add in the garlic, salt and pepper.
Pour in the chicken broth over the cauliflower.
Secure the lid and set the valve to Sealing.
Cook on High Pressure for 8 minutes.
When the cook time is complete, perform a quick release.
Using an immersion blender, carefully blend the cauliflower mixture directly in the Instant Pot until smooth and creamy. (A hand mixer can also be used.)
Stir in the heavy cream and 2 cups shredded cheddar cheese.
Continue stirring until the cheese is completely melted and incorporated.
Ladle the soup into bowls and top each serving with the chopped bacon and remaining shredded cheese.