In a small mixing bowl, whisk together soy sauce, rice vinegar, hoisin sauce, cornstarch, chicken broth, and sesame oil until the cornstarch is fully dissolved.
Heat avocado oil in a large wok or non-stick skillet over medium-high heat until shimmering.
Add chicken cubes to the wok and sear for 5 to 7 minutes, stirring occasionally, until the internal temperature reaches 165°F (74°C). Remove chicken and set aside.
Add red bell pepper and zucchini to the remaining oil in the wok and stir-fry for 3 minutes until slightly softened but still crisp.
Incorporate minced garlic, ginger, and dried chilies into the vegetables; sauté for 60 seconds until aromatic.
Return the cooked chicken to the wok and pour the prepared sauce over the mixture.
Cook for 2 minutes while tossing constantly until the sauce has thickened and achieved a glossy consistency.
Fold in the peanuts and green onions, then remove from heat immediately to serve.