Set the Instant Pot to Saute mode. Add oil, cumin, garlic, onion, poblano peppers, chicken, jalapenos, beans, and salt. Mix well. Add water and give a quick stir.
Close Instant Pot lid with pressure valve to sealing. Set Instant Pot to Manual / Pressure Cook(Hi) for 5 minutes followed with 10 minutes Natural Pressure Release.
Mix masa harina in ½ cup of water. Add this paste to the chili. Set Instant Pot to Saute mode and bring the chili to a gentle boil. Garnish with cilantro. Enjoy hot with an additional garnish of cheese and a squeeze of fresh lime.