Let puff pastry dough sit for 15 minutes at room temperature.  Heat oil in a skillet over medium-high. Add beef and onion; cook and stir, breaking ground beef into crumbles, until starting to brown, about 3 minutes. Add red bell pepper; cook, stirring occasionally, until red bell pepper is starting to soften, about 4 minutes. Season ground beef mixture with cumin, paprika, oregano, salt, and ground black pepper. Drain oil and transfer ground beef filling to a bowl; let cool 5 minutes.  Cut puff pastry into rounds, about 6 inches in diameter. Preheat air fryer to 400°F (200°C). Place 1 to 2 tablespoons filling in the center of each puff pastry round. Brush water around half of outer edge of each round. Fold round over filling and pinch edges to seal. Using a fork, crimp edges. Repeat process with remaining wrappers and filling. Beat egg and 1 tablespoon water together in a bowl to form an egg wash. Brush each empanada with egg wash and spray with cooking spray. Place empanadas in single layer in air fryer basket and cook for 5 minutes. Flip empanadas and continue cooking until light golden brown, about 5 minutes more. Repeat with remaining empanadas.