Soak brown rice noodles in hot water for 10 minutes until tender, then drain well.
In a small bowl, whisk together the tamari, fish sauce, lime juice, maple syrup, and red pepper flakes.
Heat the avocado oil in a large skillet or wok over medium-high heat and sauté the minced garlic until fragrant.
Add the shrimp to the skillet and cook until they turn pink and opaque, approximately 3 minutes.
Push the shrimp to one side of the pan, crack the egg into the empty space, and scramble until fully cooked.
Incorporate the soaked noodles, bean sprouts, and the prepared sauce, tossing everything together until the noodles are evenly coated and hot.
Serve immediately, garnished with sliced green onions and crushed peanuts.