Cut zucchini into thin slices, about 1/4 inch thick.
Toss zucchini slices with almond milk to coat.
In a large bowl, combine almond flour, nutritional yeast flakes, Italian seasoning, onion powder, garlic powder, and salt.
Brush or spray the air fryer basket with oil. Preheat the air fryer to 390 degrees. Working in batches, dip zucchini slices in the breading mixture and coat them on both sides.
Lay the coated zucchini slices on the basket in a single layer. Bake for 12 minutes, turning halfway, or until golden brown and crisp. Repeat until all the slices are baked.