Add chicken thighs pieces to bowl and season with one teaspoon of all purpose seasoning, mix to coat and set aside.
Set instant pot to saute mode. Once hot, add olive oil to inner pot.
Add in sliced sausage and saute about 2 minutes until slightly browned. Remove sausage and set aside.
Add in chicken pieces and brown for about 3 minutes. Remove and set aside.
Deglaze pot with a little water if needed. Add in celery, onion, bell pepper, green onion, and parsley and saute about 2 minutes until softened.
Add in minced garlic and saute until fragrant.
Turn off saute function, add in browning sauce and stir to coat the veggies.
Add in 3 cups water. Stir to help deglaze bottom of inner pot if needed.
Add in cajun seasoning, remaining all purpose seasoning, garlic powder, onion powder, and chicken bouillon powder and stir.
Add chicken and sausage back to pot making sure to add in any drippings/juices left from the chicken as well.
Add in the rice and gently push it down so that it is mostly covered with liquid.
Switch instant pot to manual and high pressure. Set cook time to 4 minutes. After cook time, allow to naturally release for 6 minutes.
Switch lid to venting to release remaining pressure. Remove lid and stir to combine.
Replace lid and allow flavors to settle for about 5 minutes. (optional)
Serve.