Remove the banana from the air fryer. It should be warm, soft, and slightly aromatic. Transfer it immediately to a serving bowl or plate. The banana should still be in its skin, opened like a book with both halves visible.
Spoon your yogurt mixture generously into the center and along both banana halves, filling the crevices where the banana opened. Top with your chopped pecans, distributing them so you get nuts in every bite. Sprinkle an additional pinch (about one-eighth teaspoon) of cinnamon over everything—this creates a visual layer and reinforces the spice note.
Drizzle the remaining 1 teaspoon of maple syrup over the top in a thin stream, letting it pool slightly in the yogurt and down the banana. If you're using them, add colored sprinkles and a fresh cherry as the final flourish. Serve immediately while the banana is still warm—the temperature contrast between warm fruit and cool yogurt is essential to the experience.