In a medium bowl, combine the ground chicken, shredded cabbage, sliced green onions, grated ginger, minced garlic, sea salt, and black pepper until well incorporated.
Place a small spoonful of the chicken mixture in the center of each dumpling wrapper, moisten the edges with water, and fold to seal tightly.
Heat the avocado oil in a non-stick skillet over medium-high heat and sear the dumplings until the bottoms are golden and crispy.
Carefully pour two tablespoons of water into the pan, cover immediately with a lid, and steam for five minutes until the chicken is cooked through.
In a small jar, whisk together the tamari, rice vinegar, toasted sesame oil, and red chili flakes to create the glaze.
Remove the lid, pour the glaze over the dumplings, and toss gently until they are coated in a shimmering, savory sauce.