Line air fryer with parchment paper, letting it extend up a bit on the sides to catch the juices.
Peel 2 peaches and cut them into slices.
Lay the peach slices onto the parchment paper.
Melt some butter and stir in some brown sugar. Brush the mixture onto the peach slices.
Air fry at 350 F for 10 to 12 minutes.