Chicken and Waffles Nachos

Name: Chicken and Waffles Nachos
Cuisine: American, Mexican, Latin American, TexMex
Ingredients: Waffles; 2 1/2 cups all-purpose flour; 2 teaspoons baking powder; 1 1/2 teaspoons kosher salt; 2 eggs; 1 egg yolk; 2 cups room temperature milk; 10 tablespoons unsalted butter, melted and cooled to warm; 1 1/2 cups cheddar cheese; 1/2 Parmesan cheese; Cheese Sauce; 2 tablespoons butter; 1 tablespoon flour; 1 1/2 cups sharp cheddar cheese; 7 slices cooked bacon; 3 cups popcorn chicken; 2 tablespoons Sriracha, or more to taste; 2 tablespoons scallions