Preheat the Air Fryer to 380°F for 3 minutes.
Set up a dredging station with three shallow dishes.
In the first dish, combine flour, cornstarch, garlic powder, salt, black pepper, and cayenne.
In the second dish, whisk eggs with 2 tablespoons wing sauce and the buttermilk to make an egg wash.
Add panko breadcrumbs to the third dish.
Pound chicken breasts to an even thickness for consistent cooking; if large, slice to make 4 portions.
Dredge each chicken piece in the flour mix, then the egg wash, then the panko, pressing to help the crumbs adhere.
Place breaded chicken in the Air Fryer basket in a single layer.
Cook at 380°F for 10 minutes.
Flip using tongs and cook 10 more minutes, or until the internal temperature reaches 165°F.
In a mixing bowl, combine melted butter with 1/3 cup wing sauce to make buffalo sauce.
Toss the cooked chicken in the buffalo sauce to coat.
Toast the buns in the Air Fryer at 350°F for 2 minutes, cut-side down.
Mix coleslaw with ranch dressing and dry ranch seasoning to make a quick ranch slaw.
Build sandwiches: bottom bun, ranch slaw, buffalo chicken, pickle chips, top bun.
Serve immediately for best crunch.