Preheat air fryer to 400 degrees F, air fryer setting.
Grease six 4-ounce ramekins.
Add berries and granulated sugar to the mixing bowl and toss until coated.
In a separate bowl, mix flour, butter, brown sugar, and milk until well combined.
Add ¼ cup batter to each ramekin.
Add heaping ¼ cup berries to each ramekin.
Add oats to the remaining batter and mix.
Top ramekins with two tablespoons oat mixture.
Place in air fryer basket *You may need to do more than one batch*
Cook for 15 minutes, then remove from the air fryer basket.
Allow to cool slightly, then top with optional ice cream and mint leaves before serving.
Plate, serve, and enjoy!