First, you’ll need to use this cheat sims.get_sim_id_by_name (First Name)(LastName) and hit enter to learn your sim’s sim ID, then input it into the cheat code. These cheats are a bit different because they use a sim ID which you’ll need to use a cheat code to find out.
There are a ton of vampire powers for your vampire sims to unlock to change the way that they function, and you normally need to unlock these with vampire power points.