In a small bowl, whisk together the Greek yogurt, dried dill, garlic powder, onion powder, sea salt, and black pepper to create a clean-eating ranch dressing.
In a separate small bowl, melt the ghee and whisk in the buffalo hot sauce until smooth and emulsified.
Sauté the diced chicken breast in a skillet over medium heat until golden and cooked through, then toss thoroughly in the buffalo sauce mixture until every piece is coated.
Finely chop the romaine lettuce, celery, and carrots to ensure a consistent crunch in every bite.
Lay the whole wheat tortilla flat, spread a generous layer of the yogurt ranch in the center, and top with the buffalo chicken, chopped vegetables, and sliced avocado.
Fold in the sides of the tortilla and roll tightly to secure the filling, then slice diagonally to serve.