Add the chicken, rice, beans, corn, tomatoes, broth, and taco seasoning to the Instant Pot. Give it a good stir.
Close the lid, set the valve to sealing, and cook on high pressure for 10 minutes.
Let the pressure release naturally for 5 minutes, then quick release the rest.
Stir everything together, sprinkle with cheese, and let it melt in the residual heat.
Serve warm with your favorite toppings like avocado, sour cream, or salsa.