Preheat oven to 425°F and line baking sheet with parchment.
Mix chickpea flour, water, cornstarch, garlic powder, onion powder, paprika, salt, and pepper into a smooth batter.
Dip cauliflower florets in batter until coated evenly.
Arrange florets on baking sheet and bake 20 minutes until golden and crisp.
In saucepan, combine soy sauce, maple syrup, rice vinegar, sesame oil, ginger, garlic, and chili flakes.
Simmer sauce for 5 minutes until slightly thickened.
Toss baked cauliflower wings in sticky glaze until fully coated.
Return wings to oven for 5 minutes to caramelize.
Garnish with sesame seeds and scallions before serving.