Yes, it works for frozen foods directly. It has a dedicated "Frozen" cooking function among its Turbo Modes, designed to cook frozen items using the highest fan speed.
Use the crisper plate for best results with the 360° air flow. Do not overfill the basket; place smaller batches to ensure even cooking. Increase cooking time or temperature if the food is not completely cooked.
For mozzarella sticks specifically, keep an eye on them to prevent burning, which can cause dark smoke. If you see dark smoke, unplug immediately.