Pat the chicken breast dry and dice into bite-sized pieces.
Season the chicken evenly with sea salt, black pepper, and garlic powder.
Heat avocado oil in a skillet over medium-high heat.
Add the chicken to the skillet and cook for 6-8 minutes, stirring occasionally, until golden brown and cooked through.
In a small bowl, whisk together the Greek yogurt, dried dill, onion powder, and apple cider vinegar to create the ranch dressing.
In a medium bowl, combine the cooked chicken with the buffalo sauce and half of the prepared ranch dressing.
Lay out the butter lettuce leaves on a serving plate.
Fill each lettuce leaf with the buffalo chicken mixture.
Top the wraps with diced celery, shredded carrots, and sliced green onions.
Drizzle with the remaining ranch dressing and serve immediately.