Fried chicken that you can get at the grocery store or restaurants like KFC are not keto friendly. They use a lot of flour in their coatings and batters. We made our fried chicken keto friendly by replacing the wheat flour with keto versions for the breading.  Frying or air frying is fine for keto diets. It does not change the carb contents of the food. An air fryer helps with an low calorie diet for those looking to reduce their calories as well as their carb intake.