I have been doing research on this editor and it is amazing. They have taken the Unreal Engine Editor and applied it to the FortNite Platform. There are assets, a scripting language called Verse and an incredible World Editor. Virtually any kind of game can be made from this current platform.

Is this something that can be used to build a game for in the next Jam?

https://www.unrealengine.com/en-US/free-download/uefn-unreal-editor-for-fortnite?utmsource=BingSearch&utmmedium=Performance&utmcampaign=554380763&utmid=1297424827062610&utmterm=unreal%20editor&utmcontent=