Preheat oven to 375°F. Grease a 9 x 13-inch baking dish or spray with nonstick cooking spray.
Whisk the chicken broth, barbecue sauce, pickle brine, oregano, seasoned salt, onion powder, garlic powder, and black pepper directly in the prepared dish until fully combined.
Stir in the uncooked rice, carrots, pulled pork, and ½ cup of the grated cheese. Make sure everything is evenly distributed and submerged in the liquid.
Cover the dish tightly with foil, pressing the edges down firmly to seal in the steam. Bake for 55 to 60 minutes, or until the liquid is absorbed and the rice is tender. Taste a few grains to check; if the rice is still firm, re-cover tightly and bake another 5 to 10 minutes.
Uncover and fluff the rice gently with a fork (don't stir with a spoon, which can compact the grains). Season with salt and pepper to taste.
Sprinkle the remaining 1 cup of cheese over the top. Place the dish under the broiler for 1 to 2 minutes, watching closely, until the cheese is melted and turns golden in spots.
Garnish with chopped fresh herbs, sliced dill pickles, or green onions, if desired, and serve hot.