Add olive oil, chicken, taco seasoning, salt and pepper, salsa and chicken broth to Instant Pot. Cook on high pressure for 4 minutes. Instant Pot will take about 10-15 minutes to preheat and then cook on high pressure for the 4 minutes. Meanwhile, prepare veggies.
Do a quick pressure release, then open lid when safe to do so and remove breasts with a fork, leaving sauce. Shred with a fork and knife, then dump shredded chicken back in with sauce.
Add lettuce, black beans, corn, chicken, cheese, onion, cilantro and avocado to a large bowl, then serve and enjoy! If packing in meal prep bowls, they should last in the fridge about 5 days.