Preheat the air fryer on BAKE at 300ºF and set the cooking time for 10 minutes. If using a toaser oven-style air fryer, line the cooking pan with parchment paper. If using a basket-style air fryer, cut a 12-inch square of aluminum foil. Press the foil down into the air frying basket, making sure it goes only a couple inches up the sides. Trim if necessary, then remove the foil from the air fryer (you don't want it in there during the preheating, as it won't be weighed down).
In a bowl, stir together the coconut, peanuts, sesame seeds, agave nectar, avocado oil, turmeric, red pepper flakes (if using), and salt until evenly combined.
If using a toaster oven-style air fryer, spread out the mixture in an even layer on the lined cooking pan. If using a basket-style air fryer, place the foil in the basket, then add the mixture and spread it out in an even layer.
Bake the crunch topping in the preheated air fryer.
Let the crunch topping cool on the cooking pan or in the air frying basket for at least 10 minutes, then break it up and serve over soup. To store any leftover crunch, let it cool to room temperature, then transfer to a tightly lidded container and store at room temperature for up to 2 weeks.