Bring a large pot of salted water to a boil. Add the fettuccine and cook until al dente, about 10-12 minutes. Drain and set aside.
While the pasta cooks, melt the butter in a large skillet over medium heat. Add the minced garlic and sauté until fragrant, about 1 minute, until it smells nutty and starts to turn golden.
Pour in the heavy cream and bring it to a gentle simmer, stirring constantly. Allow the sauce to thicken slightly, about 3-4 minutes, until it coats the back of a spoon.
Stir in the grated Parmesan cheese and season with salt and pepper to taste. Continue whisking until the sauce is smooth and creamy.
Gently fold in the cooked lobster meat into the sauce, allowing it to warm through for 2-3 minutes. The lobster should be tender and coated in the rich sauce.
Add the drained pasta to the skillet. Toss everything together carefully to ensure the pasta is fully coated with the sauce and the lobster is evenly distributed.
Cook for another minute to let the flavors meld. Check seasonings and adjust with more salt or pepper if needed.
Serve the lobster Alfredo pasta hot, garnished with additional Parmesan or fresh herbs if desired. Enjoy the luxurious, silky pasta with tender lobster in every bite.