01 - In a medium bowl, combine softened cream cheese, mayonnaise, fresh dill, garlic powder, black pepper, and salt until smooth and well incorporated.
02 - Gently fold the chopped chicken, finely chopped dill pickles, diced red onion, and diced celery (if using) into the cream cheese mixture until thoroughly combined.
03 - Lay one large flour tortilla flat. Evenly spread approximately one-quarter of the chicken mixture across the tortilla, maintaining a small border around the edges to facilitate rolling.
04 - Carefully and tightly roll each tortilla lengthwise. Repeat this process for the remaining tortillas and filling.
05 - Using a sharp knife, slice each rolled tortilla into approximately six equal-sized pinwheels.
06 - Arrange the prepared pinwheels on a serving platter. They can be served immediately, or refrigerated for up to 4 hours for optimal texture and flavor consolidation.