Sheet Pan Swirl Pancakes

Name: Sheet Pan Swirl Pancakes
Ingredients: 2 green apples, peeled, cored and diced small; 1 cup pecans, toasted and chopped; 1/2 cup dark brown sugar; 1/4 cup applesauce; 1 tablespoon ground cinnamon; 2 large eggs, beaten; 2 1/2 cups buttermilk; 1 teaspoon vanilla extract; 2 1/2 cups all-purpose flour; 1 tablespoon baking powder; 1 tablespoon granulated sugar; 1 teaspoon baking soda; 2 tablespoons unsalted butter, melted; 1 cup pure maple syrup; 1 teaspoon vanilla bean paste; Pats of unsalted butter, for serving