Combine the batter mix from the kit with 10 tablespoons of water. Whisk until smooth. Place the seasoned coating from the kit on a plate or in a shallow bowl.
Pound the chicken breasts lightly to even out. Cut each breast in half crosswise so that you have 4 equal-sized portions. Coat the chicken in batter then dredge in the seasoned coating.
Add enough oil in a large skillet to come up ¼ inch. Heat over medium-high heat until it begins to shimmer. Fry for 4-6 minutes per side or until golden brown and the chicken reaches an internal temperature of 165°F. Drain on paper towels.
Combine the mayonnaise with sriracha sauce and mix well. Heat the gravy from the meal kit in a small saucepan until hot.
Spread the spicy mayonnaise on both sides of the buns, place some pickles on the bottom bun, top with the chicken, then the top bun.
Sprinkle the cooked fries with chicken or garlic salt. Pour on the hot gravy and serve with the sandwiches.
The chicken can also be cooked in an air fryer; spray with oil and place in an air fryer preheated to 400°F. Cook for 12 minutes, flipping halfway through.