Heat avocado oil in a large, deep pan over medium heat. Add the oyster mushrooms in an even layer and season with salt and pepper. Sauté for 5 to 7 minutes, flipping half way through, until the mushrooms are golden brown and slightly crisp at the edges. Remove from the pan and set aside.
In the same pan, add the minced garlic, garlic and chili crisp. Sauté for about 30 seconds, until fragrant. Stir in the tahini, sesame oil, and turmeric, allowing the mixture to warm and become smooth.
Add the liquid aminos, white miso paste, coconut milk, and vegetable broth. Stir well to fully dissolve the miso and tahini into the broth. Add the date sugar and bring the mixture to a gentle simmer. Cook for 5 to 10 minutes, stirring occasionally. Season with salt and pepper to taste. Broth is done when it's nice, semi thick and creamy.
While the broth simmers, cook the ramen noodles according to the package instructions. Drain and divide the noodles between serving bowls.
Pour the hot broth over the noodles, then top with the sautéed oyster mushrooms. Garnish with sliced scallions, fresh cilantro, and additional chili crisp if desired. Serve immediately.