Preheat your air fryer basket to 400 degrees F for 5 minutes.
In a large bowl, whisk together the rice flour, all purpose flour, cornstarch, baking powder, and kosher salt. Add the club soda and whisk until no large lumps remain.
Spray the preheated air fryer basket with avocado oil spray and then carefully dip a cauliflower floret into the batter and place it in the air fryer. Repeat with as many florets as will fit, but make sure not to overcrowd the air fryer. Use caution as the air fryer is preheated.
Cook at 400 degrees F for 12 minutes. Flip the cauliflower and cook for an additional 8 minutes. Between batches, keep the cauliflower on a cooling rack set over a baking sheet– this will help keep it crispy until you’re ready to sauce them.
Meanwhile, add the BBQ sauce, non-dairy butter, and red pepper flakes to a large microwave safe bowl. Cook for 1 minute, or until the butter is melted and then whisk to combine.
Toss the cooked cauliflower in the sauce and then return it to the air fryer. Cook at 400 degrees F for an additional 5 minutes.
Serve immediately to avoid the wings becoming soggy, garnish with chopped green onion or parsley.