Cut each bread slice into 3 long sticks and set aside.
In a shallow bowl, whisk together eggs, milk, sugar, vanilla extract, cinnamon, and salt until well combined.
Preheat air fryer to 370°F for 3 minutes. Spray the basket with cooking spray.
Dip each bread stick into the egg mixture, coating all sides but letting excess drip off. Place in a single layer in the air fryer basket without overcrowding.
Air fry for 8-10 minutes, flipping halfway through, until golden brown and crispy on the outside.
Remove from air fryer and dust with powdered sugar. Serve immediately with maple syrup for dipping.