Preheat oven to 400 degrees Fahrenheit (200 degrees Celsius).
In a small mixing bowl, combine shredded chicken with buffalo sauce until fully coated.
Place flatbreads on a parchment-lined baking sheet.
Distribute the buffalo chicken mixture evenly across both flatbreads.
Top with shredded mozzarella cheese and sliced red onions.
Bake for 10 to 12 minutes until the cheese is bubbling and the edges are crisp.
Remove from oven and garnish with blue cheese crumbles and fresh chives.
Drizzle with Greek yogurt as a high-protein substitute for ranch dressing.