Preheat oven to 400°F with racks in the upper and lower third positions.
Coat 2 large rimmed baking sheets with cooking spray.
Cut wonton wrappers in half on the diagonal to create triangles.
Arrange in a single layer on prepared baking sheets; coat with cooking spray.
Bake in preheated oven until golden and crisp, 6 to 8 minutes, rotating baking sheets top to bottom and back to front halfway through.
Let cool on baking sheets slightly, about 5 minutes.
Stir together crabmeat, cream cheese, scallions, Sriracha, soy sauce, lemon juice, sugar, garlic powder, grated garlic, and salt in a medium bowl until combined.
Arrange baked wonton chips in an even layer on a large rimmed baking sheet.
Dollop crab mixture evenly over chips.
Bake on upper third rack in preheated oven until crab mixture is warmed through, about 5 minutes.
Remove from oven, drizzle evenly with sweet chili sauce, and garnish with additional scallions, cilantro, jalapeños, and sesame seeds, as desired.
Serve immediately.
