Preheat the oven to 425°F (220°C). Line a large baking sheet with parchment paper.
Heat the olive oil in a skillet over medium-high heat. Add the ground beef and cook for 6 to 8 minutes, breaking it into small crumbles, until fully browned. Drain any excess fat.
Stir in the garlic powder, Italian seasoning, salt, and black pepper. Cook for 1 minute, then remove from the heat.
Arrange the flatbreads on the prepared baking sheet. Divide the pizza sauce between them and spread it almost to the edges.
Spoon the cooked beef evenly over the sauce and scatter the mozzarella on top.
Bake for 8 to 10 minutes, until the cheese is bubbling and the flatbread edges are crisp and golden.
Rest for 2 to 3 minutes, slice, garnish with parsley if desired, and serve warm.