Here is a link to
Intellectual Property (IP) and DMCA Guidelines for Fortnite Island Creators
The content you create, publish, or use cannot infringe or violate someone else’s rights, including their intellectual property rights (such as by infringing another’s copyright or trademark). You must own or have obtained the necessary rights to share and publish the content. If you are a team owner, even if another member of your team made or imported infringing content, you are responsible for the content that is published.
Any license of the content must be broad enough to grant Epic a license consistent with the Fortnite Island Creator Rules. Please note that content that is blocked by our audio filter, which is intended to keep infringing content out of Fortnite, cannot be published at this time, even if you have otherwise obtained a license.
Even if third-party intellectual property otherwise exists in Fortnite (such as Locker items and Characters based on movie or TV characters), you do not have the right to use that content to create your island without a separate license from that third party.
Possibly they filled in the boxes in a way that the Moderator was happy with
Sorry if pointing to documentation but everything has to attempt to meet standards