Preheat air fryer to 375°F (190°C).
Prepare the pineapple by peeling and coring it, then cutting it into rings or wedges.
In a bowl, mix brown sugar and cinnamon together.
Brush or toss the pineapple with melted butter (if using) and coat it with the sugar-cinnamon mixture.
Arrange the pineapple pieces in a single layer in the air fryer basket.
Air fry the pineapple for about 10-12 minutes, flipping halfway through.
Check for tenderness and a golden-brown exterior before removing from the air fryer.
Serve warm, garnished with mint or a drizzle of honey if desired.
