Toss chicken tenders with kosher salt, white pepper, black pepper, garlic powder, onion powder, ginger powder, and cayenne. Coat evenly, cover, and refrigerate for 30 minutes or up to overnight.
Set three bowls: plain flour (1 cup), wet batter (½ cup flour, egg, ice-cold sparkling water whisked), and seasoned flour (2 cups flour with salt, white pepper, black pepper, garlic powder, onion powder).
Add 1 tbsp sparkling water to seasoned flour. Rub to form small clumps for extra crispiness.
Dust tenders in plain flour, dip in wet batter, then press into seasoned flour. Let rest 10 minutes.
Heat 2 inches of oil in a heavy pot to 350°F. Fry 3-4 tenders at a time for 4-5 minutes until light golden. Drain on wire rack.
Reheat oil to 350°F and fry tenders 1-2 minutes until deep golden and crispy. Drain and lightly salt.
Melt butter over medium heat, add honey, sugar, and soy sauce. Stir until sugar dissolves and sauce thickens.
Brush or toss fried tenders in honey butter sauce quickly. Serve immediately.