Air Frying is different from deep frying and, because of the differences, it is difficult to get great results with a wet batter alone when cooking in an air fryer. I have done a lot of testing with wet battered chicken and, even when I freeze it and then air fry, the results are not as good as if you do a wet batter and then coat in breadcrumbs to set the wet batter. Whether you use bread crumbs or panko breadcrumbs or a combination of the two, I do recommend using some sort of dry coating after dredging through a wet batter for any air fried food.