Pat your chicken dry with paper towels then season evenly with salt, black pepper, and garlic powder.
In a large bowl, combine buttermilk and eggs and mix well to combine. Add chicken and submerge the chicken for 30 mins up to overnight.
In a large plate, make the coating by combining all-purpose flour, cornstarch, salt, pepper, garlic powder, onion powder, and smoked paprika. Remove chicken thighs from buttermilk mixture, shake off excess then dip in the flour mixture and coat well all over. Transfer to a clean plate. Repeat with remaining chicken thighs.
Preheat air fryer to 375F for a few mins. Spray the air fryer basket then add chicken (don’t overcrowd and cook in batches as needed) skin side down and spray the top of the chicken generously with oil. Air fry for 13 mins, flip the chicken with skin side up, then continue frying for another 12-14 mins. The chicken should reach internal temperature of 165F and skin should be golden brown.If deep-frying, heat oil in a large pot at 350F then cook for 13-16 mins until internal temperature reaches 165F. While the chicken is cooking, make the honey butter sauce by combining soy sauce, honey, garlic, water, and cornstarch in a cup or bowl. Set aside until the chicken is done cooking.
In a large skillet, add butter and let it melt down then add the sauce mixture and cook for 3-4 mins until thickened. Turn off the heat then add the chicken to the pan and coat evenly. Transfer chicken to a wire rack and save any extra sauce for drizzling later.
Serve chicken with pickled vegetables, fries, and any other desired sides.