Preheat your air fryer to 380°F (193°C).
In a large bowl, whisk together flour, water, garlic powder, paprika, salt, and pepper to make a smooth batter.
Dip each cauliflower floret into the batter, allowing excess to drip off, and place it in the air fryer basket in a single layer.
Air fry for 12-15 minutes, shaking the basket halfway through, until crispy and golden brown.
In a separate bowl, mix melted butter with hot sauce.
Toss the crispy cauliflower bites in the hot sauce mixture until well coated and serve immediately.