Press tofu for 10 minutes. Squeeze chopped kimchi and cabbage until very dry.
Cook glass noodles until tender. Drain, cool, and chop into small pieces.
Combine pork, crumbled tofu, kimchi, cabbage, noodles, scallions, garlic, ginger, soy sauce, sesame oil, sugar, salt, and pepper. Mix until sticky.
Set up a wrapping station. Place 1 tablespoon filling in each wrapper, moisten edges, fold, and pleat to seal. Keep covered.
Heat 1 tablespoon oil in a nonstick skillet over medium. Arrange dumplings flat-side down and brown 2–3 minutes.
Pour in water, cover, and steam 3–4 minutes. Uncover and cook until water evaporates and bottoms crisp.
Stir together dipping sauce ingredients: soy sauce, rice vinegar, sesame oil, gochugaru, and scallion.
Serve dumplings hot with the dipping sauce.