Air Fryer French Toast

Ingredients

• ✓ 2 large eggs
• ✓ ⅓ cup milk
• ✓ 1 tablespoon salted butter, melted
• ✓ 1 teaspoon vanilla extract
• ✓ 1 teaspoon ground cinnamon
• ✓ 4 slices day-old bread
• ✓ cooking spray
• ✓ 1 teaspoon confectioners' sugar, or to taste