Heat olive oil in a large pot over medium heat.
Add diced onion and cook until translucent, about 5 minutes.
Add minced garlic and diced red bell pepper, cook for another 2-3 minutes.
Add shredded chicken, chicken broth, diced tomatoes, ground cumin, and chili powder. Stir to combine.
Bring to a boil, then reduce heat and simmer for 15 minutes.
Add corn kernels and black beans. Simmer for another 5 minutes.
Season with salt and pepper to taste.
Serve hot, garnished with tortilla strips, avocado, cilantro, and lime wedges.