Preheat your oven to 400°F (200°C).
In a medium bowl, mix the shredded chicken with the BBQ sauce until evenly coated.
Place the flatbreads on a baking sheet and brush each one lightly with olive oil.
Spread the BBQ chicken mixture evenly over the flatbreads.
Sprinkle the mozzarella cheese on top, then add the sliced red onion.
Bake for 10 to 12 minutes, or until the cheese is melted, bubbly, and lightly golden around the edges.
Remove from the oven and finish with chopped cilantro before slicing and serving.
Serve BBQ Chicken Flatbread Pizza warm for the best flavor and texture.