Place the chicken in the bottom of the pressure cooker.
Top with black beans, tomatoes, corn, salsa, onion, green pepper, and cilantro.
Whisk together lime juice, olive oil, cumin, chili powder, and garlic powder.
Pour over chicken and vegetables.
Set manual cook time to 10 minutes.
Let the pressure release naturally for 5 minutes, then release remaining pressure.
Serve over rice, topped with cheese, sour cream, and sliced avocado, if desired.