Add the onion and minced garlic to the Crock Pot or Instant pot and then add in the chicken.
Next, add the broth, tomatoes, black beans, chilies and corn.
Sprinkle the garlic powder, black pepper, chili powder, oregano, and cumin on top of the chicken and the vegetables.
For the Crock Pot, cover and cook for 10 hours on low. For the Instant Pot, seal the pressure cooker and cook for 25 minutes.
When done, remove the lids (If using the pressure cooker release the pressure first), and taste. Add in 1/2 or all of the lime juice as desired and season with the sea salt, using 1 tsp. at a time.
Add in the flour or the corn starch to thicken if you like. Add 1 Tbsp. at a time so you can get a consistency you enjoy.
Season with additional salt and pepper as desired and serve with tortillas, cilantro, avocado and sour cream if you like.