Pat wings dry, season with salt and pepper, and toss with oil.
Roast at 425°F (220°C) for 30–35 minutes, flipping once, until crisp and cooked through.
Meanwhile, toast crushed Szechuan peppercorns in a dry pan for 1 minute to bloom the aroma.
Sauté garlic and ginger in a splash of oil, add soy, vinegar, honey, pepper flakes, and toasted peppercorns; simmer 2–3 minutes.
Stir in cornstarch slurry if you want a thicker, glossy sauce.
Toss roasted wings in the sauce until well coated, garnish, and serve immediately.