In a large skillet, melt the butter over medium heat. Add the diced carrots, celery, and cook until softened, about 5 minutes.

Sprinkle in the flour and stir for 1 minute. Gradually add the heavy cream and chicken broth, stirring constantly until thickened.

Add the shrimp, lobster, peas, Old Bay seasoning, salt, and pepper. Cook for an additional 5 minutes until the seafood is heated through. Remove from heat.

In a mixing bowl, combine the flour, baking powder, garlic powder, and salt. Stir in the cheddar cheese.

Add the melted butter and milk, mixing until just combined. Do not overmix.

Preheat the oven to 400°F (200°C). Pour the seafood filling into a baking dish.

Drop spoonfuls of the biscuit mixture over the seafood filling, covering it as much as possible.

Bake in the preheated oven for 25-30 minutes or until the biscuits are golden brown and cooked through.