Preheat your oven to 350°F (175°C). Lightly grease a 9x13-inch baking dish with cooking spray to prevent sticking.
In a large bowl, combine cream of chicken soup, sour cream, chicken broth, garlic powder, onion powder, salt, and black pepper. Stir well until smooth and creamy.
Spread the cooked rice evenly in the prepared baking dish. Layer the shredded chicken over the rice, then pour the creamy sauce mixture over the top. Spread evenly to ensure every bite is flavorful.
Sprinkle the shredded mozzarella cheese on top. Cover with foil and bake for 30 minutes. Remove the foil and bake for an additional 15 minutes until the cheese is melted and bubbly.