Sauté the aromatics -In a medium to large soup pot, heat the avocado oil over medium-high heat. Add the chopped onion and sauté for 4–5 minutes, stirring occasionally, until the onion is soft and translucent.
Add the garlic and spices - Add the minced garlic and cook for about 1 minute, just until fragrant. Sprinkle in the cumin, chili powder, and chipotle powder (if using). Stir and cook for another minute to bloom the spices and deepen their flavor.
Build the chili - Pour in the chicken broth, then add the drained green chiles, cannellini beans, and white shoepeg corn. Stir to combine.
Add the chicken - Stir in the shredded rotisserie chicken. Bring the chili to a gentle boil, then reduce the heat to medium-low and let it simmer.
Season and simmer - Season with salt and pepper to taste. Simmer uncovered for about 20 minutes, or until everything is heated through and the flavors have come together.
Serve and garnish - Ladle the chili into bowls and finish with a squeeze of fresh lime juice and a sprinkle of chopped cilantro.