Wrap tofu in a clean towel and press firmly for at least 10 minutes. Using a box grater, shred the tofu directly into rough, irregular strands. The irregular edges are what create the lacy crispy texture.
Pan-Fry the Tofu
Heat oil in a wide skillet over high heat. Add shredded tofu in a single even layer. Don't stir. Let it sit undisturbed 3–4 minutes until the underside is deeply golden and crispy. Toss once and let it sit again 2–3 minutes. You want most of the strands dark, crispy, and lacy at the edges. Remove and set aside.
Build the Sauce
In the same pan over medium heat, add garlic and cook 20 seconds until fragrant. Add soy sauce, oyster sauce, sesame oil, chili crisp, sugar, and stock. Stir and bring to a simmer.
Cook the Noodles
Add noodles directly to the sauce. Toss continuously as the liquid reduces and noodles absorb the sauce, 2–3 minutes. Add a splash of water if it tightens too fast. Noodles should look glossy and clingy. Add scallion and half the crispy tofu and stir into the noodles.
Plate and Finish
Mound noodles in a bowl. Pile the remaining crispy shredded tofu on top. Finish with scallions, sesame seeds, and a heavy chili crisp drizzle.