In a large saucepan, heat the seafood stock over medium heat until it is simmering. Keep it warm throughout the cooking process.
In a separate cooking pot, heat the olive oil and 1 tablespoon of butter over medium heat. Add the chopped onion and sauté until translucent, about 5 minutes.
Stir in the minced garlic and cook for another minute until fragrant.
Add the Arborio rice to the pot, stirring frequently to coat the rice with oil and butter. Cook for about 2 minutes until the rice starts to slightly toast.
Pour in the dry white wine and stir until the liquid is almost completely absorbed by the rice.
Begin adding the warm seafood stock, one ladle at a time, stirring frequently. Allow the liquid to be absorbed before adding more. Continue this process for about 18-20 minutes, until the rice is creamy and al dente.
Once the rice is cooked, gently stir in the cooked lobster meat, remaining tablespoon of butter, and the grated Parmesan cheese. Mix well and season with salt and pepper to taste.
Remove from heat and let the risotto sit for a couple of minutes to thicken slightly before serving.
Portion the risotto into serving bowls, garnish with fresh parsley, and serve hot.