In a small bowl, whisk together the Greek yogurt, dried dill, and onion powder to create a clean, high-protein ranch dressing.
Dice the chicken breast into bite-sized pieces and toss in a bowl with almond flour, sea salt, black pepper, and garlic powder until evenly coated.
Heat the avocado oil in a non-stick skillet over medium-high heat.
Add the chicken to the skillet and cook for 5-7 minutes, stirring occasionally, until the coating is golden brown and the chicken is cooked through.
Remove the skillet from the heat and pour the buffalo sauce over the chicken, tossing until every piece is well-coated.
Warm the tortilla in a separate dry pan for 30 seconds per side until soft and pliable.
Spread the prepared ranch dressing onto the center of the tortilla, then layer with shredded romaine, diced tomatoes, and the crispy buffalo chicken.
Fold the sides of the tortilla inward and roll tightly to secure the filling before slicing in half to serve.