Preheat the Air Fryer: Set your air fryer to 350°F (175°C) and allow it to preheat while you prepare the filling and topping.
Prepare the Peach Filling: In a mixing bowl, combine the sliced peaches, granulated sugar, cornstarch, vanilla extract, and ground cinnamon. Gently toss until the peaches are well-coated.
Divide the Filling: Once the peach filling is ready, distribute it evenly among individual ramekins, filling each ramekin about three-fourths full.
Create the Topping: In a separate bowl, whisk together the all-purpose flour, granulated sugar, brown sugar, baking powder, and salt. Add the cold dairy-free butter or margarine and use a pastry cutter or your fingers to cut it into the dry ingredients until the mixture resembles coarse crumbs. Pour in the water and vanilla extract, and stir until just combined.
Top the Cobbler: Spoon the topping mixture over the peach filling in each ramekin, covering the peaches entirely.
Air Fry the Cobbler: Place the ramekins in the preheated air fryer and cook for approximately 15-20 minutes, or until the topping turns golden brown and the filling is bubbling. Keep a close eye on the ramekins towards the end to avoid overcooking.
Cool and Serve: Carefully remove the ramekins from the air fryer and let them cool for a few minutes. Serve the individual peach cobblers warm, and if desired, add a scoop of ice cream or a drizzle of caramel sauce to each ramekin.