Trim the ends of the zucchini and use a spiralizer to create zucchini noodles, then set aside.
Heat the olive oil in a large skillet over medium-high heat. Arrange the shrimp in a single layer, season with salt and pepper, and cook undisturbed for 1 minute.
Add the chopped garlic and cook, stirring the shrimp for 1 to 2 minutes until cooked through, then transfer the shrimp to a plate.
Add the butter or ghee, lemon juice, lemon zest, red pepper flakes, and white wine or broth to the pan. Simmer for 2 to 3 minutes while stirring.
Stir in the parsley, then add the zucchini noodles and toss for 30 seconds to warm through.
Return the shrimp to the pan, stir for 1 minute to combine, and serve immediately.