Why can't I use my Rocket Racing vehicles in Fortnite Creative Islands?
Creative Islands do allow the use of Rocket Racing vehicles. However, access to customized vehicle options is limited and depends on how each creator chooses to develop their island.
For more details on how Rocket Racing vehicles work in Creative Islands, visit our Creative documentation (Opens in a new tab).
If you think that this is a bug, feel free to report them following these articles: