Preheat oven to 200°C and line a baking sheet with parchment.
Blend cottage cheese, eggs, oat flour, garlic powder, baking powder, salt, and olive oil until smooth. Spread into a 6 mm thick rectangle and bake for 18–22 minutes until golden. Rest 5 minutes.
Pat chicken dry, rub with spices, cook in a skillet over medium-high heat for 5–6 minutes per side until cooked through. Rest and slice.
Mix Greek yogurt and lemon juice to make the sauce. Slice flatbread, layer with sauce, chicken, lettuce, tomatoes, onion, and herbs. Wrap tightly and sear in a skillet if desired.
Notes
For extra crispiness, broil the flatbread for 1–2 minutes after baking or sear the wraps in a skillet.