In a large mixing bowl, whisk eggs (3), milk (2-3 tablespoons), maple syrup (1 tablespoon) and salt (1/4 teaspoon) until well combined.

Next, add all the bread cubes (~6 ounces) to the egg mixture bowl. Use tongs or a rubber spatula to mix well until the egg mixture has been soaked up and no dry spots remain on the bread cubes. Sprinkle cinnamon (1 teaspoon) over the bread cubes as you stir in order to evenly disperse the cinnamon. If lots of egg mixture remains in the bottom of the bowl, let the bread cubes sit in egg mixture for more 2-3 minutes, then continue stirring until most of it is soaked up.

Use a paper towel to generously wipe avocado oil on the bottom of the air fryer basket, or line with air fryer safe parchment paper. Place the soaked bread cubes into the air fryer in a single layer, not touching as much as possible. Air fry at 350F for 7-10 minutes, checking and shaking the basket after 5 minutes. Separate any cubes stuck together and continue cooking until the the french toast bites are crispy and golden brown.

Serve immediately with maple syrup and powdered sugar. Store leftovers in an airtight container in the fridge and enjoy within 3 days. Leftovers can be reheated in the air fryer at 350F for 3-4 minutes.