Season chicken breasts on both sides with salt, pepper, garlic powder, cumin and chili powder.
Place provided trivet in the bottom of a 6 qt. Instant Pot or Pressure Cooker. Add 1 1/2 cups of water (or the minimum amount of liquid needed for cooking in your specific pressure cooker)
Place chicken breasts in the Instant Pot on top of the trivet. Lock the lid, turn venting valve to the sealing position.
Cook on high pressure for 20 minutes. Natural release 5 minutes, quick release the remainder.
Remove chicken from the Instant Pot onto a plate. Shred chicken with two forks and set aside.
Reserve 1 cup of liquid from the Instant Pot, discard the rest *if desired--can use 1 cup more of chicken broth later in the recipe*
For the soup
Select the saute function on the Instant Pot and add 2 tbsp butter to the pot to melt.
When melted, add in the minced garlic and onion. Saute until fragrant and onion is slightly softened.
Add in the celery, jalapeno and carrots and saute a minute more.
Pour in the can of diced tomatoes and green chiles with liquid and deglaze the bottom of the pot to prevent burning (scrape the brown bits off the bottom of the pot).
Turn off the saute function by hitting cancel.
Stir in the cooked chicken, chicken broth and 1 cup of reserved liquid from cooking chicken (or add an extra cup of chicken broth)
Place the lid onto the Instant and Pot and turn the valve to sealing position. Select the Soup/Stew function and cook on high pressure for 10 minutes.
When finished cooking, let the Instant Pot natural release for 5 minutes, then quick release the rest of the way.
Stir in cubed cream cheese and heavy cream. Whisk until the cream cheese has melted and incorporated into the soup
Serve topped with sour cream, avocado slices, cojita cheese and low carb tortilla chips!