Heat olive oil in a medium skillet over medium-high heat. Add fajita seasoning, zucchini, and corn. Cook until zucchini is softened, about 3 minutes. Stir in beans and cook until heated through. Remove from heat.
Place tortillas on large baking sheet that’s been sprayed with olive oil or cooking spray. Broil until crisp, about 2 minutes. Add 1/4 cup of cheese and vegetable topping to each tortilla. Return to broiler and broil until cheese has melted, 1-2 minutes more. Add toppings and serve.