Set up three shallow bowls: one with flour, one with beaten eggs, and one with panko breadcrumbs mixed with shredded coconut, garlic powder, salt, and cayenne pepper.
Pat chicken tenders dry. Dredge each tender in flour, dip in egg, then press firmly into the coconut-panko mixture to coat completely.
Preheat air fryer to 400°F. Spray the basket with cooking spray. Arrange tenders in a single layer without touching.
Spray tops of tenders lightly with cooking spray. Cook for 10-12 minutes, flipping halfway through, until golden brown and internal temperature reaches 165°F.
Let rest for 2 minutes before serving with sweet chili sauce for dipping.