Start by mixing the oats, milk, maple syrup, olive oil (or vegetable oil), brown sugar, eggs, flour, baking powder, cinnamon, baking soda, and salt together.
Spray your muffin tins with non-stick cooking spray or olive oil spray.
Pour the batter into the muffin tins, filling about 1/2 way.
Sprinkle some sparkling sugar on top of the muffins.
Set in the air fryer at 320 degrees F, for 12 minutes. Check your muffins before you remove them, make sure they are fully cooked. (Mine were) If yours are not cooked, add another 3 minutes.
Plate, serve and enjoy!