Spray the donut pan with non-stick spray and set it aside.
Add the flour, salt, baking powder, and baking soda to a large mixing bowl and use a whisk to mix them.
In a second mixing bowl, add the sugar, butter, egg, vanilla and maple extracts, buttermilk, and maple syrup. Whisk to combine.
Add the wet ingredients to the dry and mix until there are no streaks of flour and the two are just combined (it may be slightly lumpy - that’s ok!).
Piping the batter equally into the six donut cavities. You can use a piping bag with a large tip, or the end cut off, or snip the corner of a plastic bag.
Set the pan into the air fryer, at 320 degrees F, air fryer setting, and air fry for 10 to 12 minutes, or until the donut springs back when gently pressed with a finger. Turn out the donuts onto a wire rack.
Add the confectioner's sugar, milk, maple syrup, and maple extract to a medium saucepan. Whisk constantly over medium heat until all ingredients combine. Once mixed, turn off heat but leave the pan on the burner, whisking the glaze occasionally to keep liquid. **
While the donuts are warm but cool enough to handle, dip one half of the donut, top side down, into the glaze.** Turn the donut right side up and place on a wire rack to finish cooling and for the glaze to set. ****
Let cool slighly.
Plate, serve, and enjoy!