Preheat air fryer to 350°. Whisk the first 6 ingredients until blended. In another bowl, toss coconut with flour; stir in egg white mixture.
In batches, place 1 in. apart on greased tray in air-fryer basket. Cook until browned, 4-5 minutes. Remove to wire racks to cool.
Dip bottoms of macaroons into melted chocolate, allowing excess to drip off. Place on waxed paper; let stand until set. Store in an airtight container.
