Add the chicken breast, black beans, corn, diced tomatoes, chicken broth, cumin, chili powder, salt, and pepper to the pot. Stir well to combine.
Close the lid of the Instant Pot and set it to manual high pressure for 10 minutes. Ensure the valve is in the sealing position.
Once the cooking time is complete, carefully quick-release the pressure by turning the valve to venting. Wait for all the steam to escape before opening the lid.
Remove the chicken breast and shred it using two forks. Return the shredded chicken to the pot and stir to combine.
Ladle the soup into bowls and top with tortilla strips, diced avocado, and lime wedges for a fresh crunch and added flavor.
Notes
For quicker prep, use leftover cooked chicken. Adjust chili powder for spice level.