How to get referenced content for scene graph? (LakeVillage featured project is broken)

I am starting to investigate scene graph and due to some errors con the LakeVillage project that is an example I decided to test this feature in other project

The problem is, on LakeVillage featured project there is a lot of exposed Fortnite assets to build the entities, but these assets are not exposed in a other project and you need to create them from zero

Am I missing something?