Bring a large pot of salted water to a boil. Cook noodles according to package directions until al dente. Drain, reserving 1/4 cup pasta water. Set aside.
Pat steaks dry and season generously with salt, pepper, paprika, and garlic powder. Heat 1 tbsp olive oil and 1 tbsp butter in a skillet over medium-high heat. Cook steaks 3–4 minutes per side (for medium-rare, adjust to preference). Remove, rest 5 minutes, then slice thinly against the grain.
In the same skillet, add another 1 tbsp olive oil and 1 tbsp butter. Season shrimp with salt, pepper, and a little paprika. Cook 1–2 minutes per side until pink and opaque. Remove and set aside.
In a clean skillet or large pan, melt 4 tbsp butter. Add minced garlic and cook until fragrant (about 1 minute). Stir in soy sauce, oyster sauce, fish sauce (if using), brown sugar, and chicken broth/pasta water. Toss noodles in the sauce until coated. Stir in Parmesan cheese and green onions.
Plate the garlic noodles. Top with sliced steak and shrimp. Garnish with more green onions, Parmesan, and a squeeze of lemon.