Slice chicken into small bite-size pieces; pat dry.
Toss chicken with 2 tablespoon soy sauce, wine, 1 teaspoon cornstarch, salt, and pepper; rest 5 minutes.
Cook noodles in salted water until just tender; drain and set aside.
Mix garlic sauce (minced garlic, soy sauce, oyster sauce, sesame oil, brown sugar, rice vinegar, broth, cornstarch) until smooth.
Heat 2 tablespoon oil in a hot wok/skillet; cook chicken 3–4 minutes until golden and cooked through; remove.
Add remaining 1 tablespoon oil; sauté garlic 20–30 seconds (don’t brown).
Return chicken + add noodles; pour sauce; toss 2–3 minutes until glossy and thickened.
Top with green onions, sesame seeds, and optional red pepper flakes. Serve hot.