Combine the Creole seasoning, garlic powder, onion powder, dried thyme, salt, and pepper in a small bowl.
Pat the turkey necks dry and season them on all sides with the seasoning mixture.
Heat the olive oil in a Dutch oven over medium heat. Once hot, add in seasoned turkey necks and sear on each side, about 2 minutes per side. Make sure to keep turning to avoid burning. Remove the turkey necks and set aside.
Add in the butter, onions, bell pepper, and celery, and cook until translucent and softened, about 5 minutes. Add the garlic and cook for an additional minute. Slowly pour in the stock, then water while scraping the bottom of the pan. Allow the mixture to come to a boil, then reduce the heat to medium-low.
Add the turkey necks to the pot, cover, and cook until the turkey necks are tender, about 2 hours. Stir occasionally, ensuring to scrape the bottom of the pan.
Once tender, remove the pan from the heat. Serve over fluffy rice and garnish with fresh parsley.