Preheat oven to 350 degrees F. (This is for the tortilla bowls)
Add the chicken, petite diced tomatoes with chilies, chicken broth, chili powder, onion powder, garlic powder, cumin, oregano and salt to the Instant Pot.
Place the lid on the Instant Pot and lock it. Make sure the lever is set to seal. Press the manual button and set the time for 10 minutes.
While the chicken is cooking add the tortillas to a taco shell mold and put in the oven for 15 minutes.
When the time is up for the chicken let the pressure manually release for 10 minutes, then release the pressure and remove the lid. Shred the chicken with two forks.
Place lettuce in the bowls, then add the chicken and cheese.