Turn instant pot to saute mode and add oil to pot. Put sausage, onion, garlic and bacon in pot. Cook until sausage and bacon are browned. Drain if necessary and return to pot.
Pour in broth and add cauliflower, spinach and Italian seasoning. Set instant pot to manual mode - 6 minutes. After it finishes allow it to natural release pressure. When it's finished the lid will unlock.
Stir in heavy cream. Serve soup garnished with parmesan cheese and crushed red pepper.