Set your Instant Pot to the Saute setting.
Brown your Italian sausage, and drain.
Place the cooked Italian sausage back into your Instant pot, and saute with onions and garlic.
Add butternut squash, chicken broth, and spinach.
Cook on high pressure for 12 minutes. Let the pressure naturally release.
Add Cream before eating. If you want to thicken the soup this would also be the time to add some corn starch to thicken it.