In my case, I have filled the same registration form on the order day with my sa(without vehicle info).Not sure if it's the same in NSW but the new rego document is an authority for the dealer to act on your behalf as an agent to register the car. They have your details but need your sign off. I'm not sure it should be ignored.
Tesla delivery advisor said that the document updated (with highlighted area for fill-up) will be merged with my previous document so there’s nothing need to do from my side.