Bring a small pot of water to a boil and cook the brown rice ramen noodles for 3-4 minutes until tender, then drain and set aside.
Season the sirloin steak on both sides with the sea salt and black pepper.
Heat the avocado oil in a cast-iron skillet over medium-high heat and sear the steak for 3-4 minutes per side for medium-rare; remove and let rest for 5 minutes.
In the same skillet, add the chicken dumplings and sear for 2-3 minutes until the bottoms are golden and crispy.
Reduce the heat to medium and add the minced garlic, grated ginger, and sliced shiitake mushrooms, sautéing for 2 minutes until fragrant.
Pour in the beef bone broth and tamari, bringing the mixture to a gentle simmer.
Add the halved baby bok choy to the broth and cook for 2 minutes until the leaves are wilted and the stems are tender-crisp.
Slice the rested steak against the grain into thin strips.
Divide the cooked noodles into a deep bowl, ladle the hot broth and vegetables over them, and top with the sliced steak and crispy dumplings.
Drizzle with the toasted sesame oil and garnish with sliced green onions before serving.