Make the fritter batter: In a medium bowl, whisk together flour, granulated sugar, brown sugar, cinnamon, baking powder, and sea salt.
In a separate small bowl, whisk together the egg, milk, sour cream, butter, and vanilla extract.
Pour the wet ingredients unto the dry ingredients, mixing with a spoon or spatula just until combined. (Do not overmix).
Fold in the diced apples.
Line the air fryer basket or tray with parchment paper and grease with cooking spray.
Using a ¼ cup measure, evenly space out 4 fritters on the parchment paper. Flatten the batter a bit with a spoon and spray the fritters with a little more cooking spray.
Air fry for about 10-12 minutes, until golden.
Meanwhile, make the glaze: In a small pot, whisk butter and maple syrup over low heat until smooth. Sift in the powdered sugar and whisk to dissolve.
Remove from the heat and whisk in the almond extract and milk until smooth.
Drizzle the glaze onto the fritters and allow the glaze to set for a few minutes before serving.