Preheat oven to 400°F (200°C) or air fryer per instructions; line baking sheet with parchment.
Pat vegan “chicken” dry; season with salt and pepper.
Place flour in a shallow bowl; plant-based milk in another.
Mix vegan parmesan, garlic powder, smoked paprika, black pepper, and panko in a third bowl.
Dredge “chicken” in flour, then milk, then parmesan-panko mixture; press lightly for coating.
Bake 25 minutes, flipping halfway, until crispy; air fryer option: 18 minutes at 375°F.
Meanwhile, sauté garlic in olive oil; add tomato sauce, Italian seasoning, and red pepper flakes.
Simmer 10 minutes; season with salt and pepper.
Serve “chicken” over marinara sauce; garnish with fresh herbs or extra vegan parmesan.