Breakfast Sliders

Name: Breakfast Sliders
Ingredients: 2 tablespoons unsalted butter, divided; 12 large eggs; 1/4 cup whole or 2% milk; 1/2 teaspoon kosher salt; 12 dinner rolls or slider buns, split; 2 1/2 cups shredded cheddar cheese, divided; 12 strips bacon, cooked and crumbled; 1/4 teaspoon garlic powder; Flaky salt, for sprinkling; 1 tablespoon finely chopped fresh parsley leaves (optional)