Set the oven to preheat at 350°F. In a large mixing bowl, thoroughly combine the cooked chicken, prepared rice, cream of chicken soup, salt, pepper, smoked paprika, garlic powder, onion powder, peas, and one cup of shredded cheddar cheese. Once blended, transfer the mixture into a 9×13-inch casserole dish, smoothing it into an even layer. Sprinkle the remaining cheddar cheese evenly across the top. Place the dish in the oven and bake for 20 to 30 minutes, or until heated thoroughly throughout and the cheese is fully melted.