Heat olive oil in a large pot over medium heat. Add diced onion and sauté for about 5 minutes until translucent. Stir in minced garlic and cook for an additional minute.
Add diced bell pepper, ground cumin, chili powder, and smoked paprika. Cook for 3-4 minutes until the bell pepper softens.
Pour in diced tomatoes and chicken broth. Stir in shredded chicken, black beans, and corn. Season with salt and pepper to taste.
Bring the soup to a gentle simmer and cook for 10-15 minutes, allowing flavors to meld.
Serve hot, topped with tortilla strips, diced avocado, and chopped cilantro. Squeeze lime juice over the top.