Combine all the ingredients in the Instant Pot. Lock the lid into place and seal the pressure valve.
Using the manual mode cook on high pressure for 25 minutes. When done release by turning the pressure valve to open, be sure to use a long spoon or a silicone oven mitt to move the valve. If you notice that your beans are not yet done, do a natural pressure release.
Open the lid and remove the chicken to shred.
Add the chicken back into the Instant Pot, stir well.
Measure and place the romaine lettuce in your bowl. Top with 1/4 of the beans, rice, and shredded chicken. Measure out and sprinkle with cheese, salsa, and avocado.