Set your Instant Pot to the Sauté function and add the olive oil. Allow it to heat up.
Once the oil is hot, add the diced onion and minced garlic. Sauté for about 2 minutes until the onion becomes translucent and fragrant.
Stir in the corn kernels and diced jalapeño. Season with salt, black pepper, chili powder, and cumin. Give it a quick stir.
Add the undrained can of cannellini beans and the chicken stock to the pot. Carefully place the chicken breasts on top.
Secure the lid on your Instant Pot and turn the knob to the Sealing position. Cook on High Pressure for 10 minutes.
When the cooking cycle is complete, carefully turn the valve to VENT to release the pressure quickly. (We recommend using an oven mitt or spatula for safety!)
Once the pressure has fully released, open the pot and carefully remove the chicken breasts to a cutting board. Shred the chicken using two forks, then return it to the soup.
Stir in the sour cream and the cubed cream cheese until everything is smooth and wonderfully creamy.
Serve your flavorful and healthy soup warm, adding your favorite garnishes if desired!