Bring a large pot of salted water to a boil. Add the 8 oz of fettuccine pasta and cook according to package instructions until al dente, usually about 10-12 minutes. Drain the pasta using a colander and set aside, reserving about 1/2 cup of pasta water.
In a large skillet over medium heat, melt 2 tablespoons of unsalted butter. Add the minced garlic and sauté for about 1-2 minutes until fragrant but not browned.
Pour 1 cup of heavy cream into the skillet with the garlic butter. Stir gently and bring the mixture to a simmer. Let it cook for 3-4 minutes, allowing the cream to reduce slightly and thicken.
Reduce the heat to low and whisk in 1/2 cup grated Parmesan cheese until melted and smooth. Season the sauce with 1/4 teaspoon salt and 1/4 teaspoon black pepper. Stir continuously to prevent the sauce from sticking or burning.
Gently fold in the 1 pound of chopped cooked lobster meat. Allow the lobster to warm through in the sauce for 2-3 minutes, being careful not to overcook.
Add the drained fettuccine to the skillet with the sauce and lobster. Toss everything together gently, adding a splash of reserved pasta water if you want to loosen the sauce slightly so it coats every strand perfectly.
Remove the skillet from heat and sprinkle 2 tablespoons of freshly chopped parsley on top for a pop of color and freshness. Serve immediately while warm and creamy.