Cut the chicken breast into bite-sized cubes and toss in a bowl with arrowroot starch, garlic powder, onion powder, sea salt, and black pepper until evenly coated.
Heat the avocado oil in a large skillet over medium-high heat.
Add the chicken to the skillet and cook for 6-8 minutes, turning occasionally, until the exterior is golden brown and crispy.
In a small mixing bowl, combine the Greek yogurt and dried dill to create a thick, clean ranch dressing.
Transfer the crispy chicken to a bowl and toss with the buffalo sauce until every piece is well-coated.
Lay the whole wheat tortilla flat and spread the yogurt ranch across the center.
Layer the shredded romaine lettuce, diced tomato, and sliced red onion over the ranch.
Top with the buffalo chicken, fold in the sides of the tortilla, and roll it up tightly into a wrap.