Preheat the air fryer to 400°F (200°C).
In a large mixing bowl, whisk together the melted coconut oil, brown sugar, cinnamon, and salt.
Add the pineapple wedges to the bowl and toss until each piece is thoroughly and evenly coated with the mixture.
Arrange the pineapple wedges in the air fryer basket in a single layer, ensuring they do not overlap to allow for proper airflow.
Cook for 12 minutes, flipping the pieces at the 6-minute mark, until the edges are golden brown and caramelized.
Remove from the air fryer and serve immediately while warm.