In a bowl, toss the chicken strips and shrimp with olive oil, garlic powder, salt, and pepper.
Preheat the air fryer to 375°F (190°C).
Place the chicken and shrimp in the air fryer basket in a single layer. Cook for 8-10 minutes, flipping halfway, until the chicken is fully cooked and the shrimp are pink and opaque. Remove from the air fryer and set aside.
In a separate bowl, whisk together the egg yolks, Parmesan cheese, and heavy cream (if using) until smooth.
In a large skillet over low heat, combine the cooked spaghetti with crumbled bacon.
Slowly pour in the egg yolk mixture, stirring constantly to coat the pasta without scrambling the eggs.
Carefully toss the cooked chicken and shrimp into the pasta, ensuring everything is evenly mixed. If the sauce becomes too thick, add a splash of reserved pasta water to loosen it.
Serve the pasta on plates, garnished with parsley and extra Parmesan, and enjoy while warm.