Thoroughly drain the crab meat and blot it dry with paper towels to remove excess moisture. Stir together the cornstarch and water in a small bowl to make a smooth sealing slurry; set aside.
In a medium bowl, beat the softened cream cheese with Worcestershire, garlic powder, onion powder, lemon zest, and white pepper until creamy and smooth.
Fold in the crab and 1/2 cup green onions gently, keeping larger crab pieces intact. Cover and chill the filling for 10–15 minutes to firm slightly for easier rolling.
Set up a rolling station: place wrappers, the chilled filling, a pastry brush, the cornstarch slurry, and a parchment-lined tray nearby.
Lay one wrapper flat like a square. Spoon about 2 heaping tablespoons of filling slightly below center and shape it into a compact 4-inch log. Brush all four edges lightly with the slurry.
Fold the bottom edge up over the filling, fold in both sides snugly, then roll up tightly to the top corner. Press the seam to seal and place seam-side down on the tray. Repeat with remaining wrappers. Tip: Chill or briefly freeze the filled rolls for 10 minutes to help prevent bursting while frying.
Heat 2 inches of canola oil in a heavy pot to 360°F (or preheat an electric fryer to 360°F). Maintain the oil between 345–365°F during cooking.
Fry 3–4 rolls at a time for 3–4 minutes, turning once, until deep golden and crisp. Transfer to a wire rack set over a sheet pan to drain while you finish the batch.
Serve hot, topped with the remaining sliced green onions and a side of sweet chili sauce for dipping.