In a small bowl, whisk together tamari, chicken broth, sesame oil, honey, garlic, ginger, and tapioca flour. until well combined. Set aside.
Heat the oil in a large, deep nonstick skillet set over medium heat. Add the broccoli, bell peppers, and red onions. Cook, stirring, until the veggies are slightly tender, 4 to 5 minutes.
Add the shrimp, salt, and pepper and continue to cook, tossing, until they begin to turn pink (they don’t need to be fully cooked yet).
Add the sauce and cook, tossing often, until the shrimp is cooked through, the sauce has thickened, and the shrimp and veggies are is well coated in the sauce, about 4 minutes.
Serve alone or over rice with a drizzle of chili oil, if desired.