Preheat air fryer to 375 degrees F and grease the basket generously with cooking spray.
In a small bowl, whisk together oil, chili garlic sauce, soy sauce, vinegar, and maple syrup until well combined, then pour into a gallon sized baggie.
Add tofu to the baggie, then seal and gently shake until evenly coated.
Sprinkle the cornstarch over the tofu, then seal and gently shake until the tofu is evenly coated in the cornstarch.
Working in batches, add tofu cubes to the preheated air fryer basket in a single layer (make sure no pieces are touching to ensure even cooking and crisping).
Air fry for 15 minutes, gently flipping halfway through.
Remove from air fryer, sprinkle with salt, then repeat with remaining tofu.
Serve as desired (example: tofu fried rice or with some sort of dipping sauce) and enjoy!
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