In a large pot, heat the olive oil over medium heat. Add the diced onion and sauté for about 5 minutes until softened. Stir in the minced garlic and cook for an additional minute until fragrant.
Add the chicken pieces to the pot and cook until they are no longer pink, about 5-7 minutes.
Stir in the chili powder, cumin, smoked paprika, salt, and black pepper, mixing well to coat the chicken.
Add the pumpkin puree, black beans, diced tomatoes with green chilies, chicken broth, and corn to the pot. Stir to combine all the ingredients.
Bring the mixture to a simmer, then reduce the heat to low. Cover and let it cook for 20-25 minutes, stirring occasionally.
Before serving, stir in the lime juice for a fresh flavor. Garnish with fresh cilantro if desired.