In a bowl, whisk together soy sauce, oyster sauce, sugar, sesame oil, cornstarch, egg white (or cornstarch and water substitute), and pepper. Add pork, scallions, and garlic. Stir firmly in one direction for 1 minute until the mixture is tacky. Refrigerate 10 minutes.
Place about 1 heaping teaspoon of filling in the center of each wonton wrapper. Lightly wet the edges with water, fold to seal tightly pressing out air, and set under a damp towel.
Bring a large pot of lightly salted water to a gentle boil. Cook wontons in batches. When they float, continue cooking 2 minutes more. Lift with a spider or slotted spoon and drain well.
In a large bowl, whisk together chili crisp, soy sauce, rice vinegar, sugar, and sesame oil. Stir in 2 to 4 tablespoons hot cooking water to loosen.
Toss hot wontons in the sauce or plate and spoon sauce over. Top with scallions and sesame seeds. Serve immediately.