You can now unlock physics-driven gameplay in Fortnite islands with the new General Physics functionality. This Experimental release gives you early access to the General Physics feature, so you can explore and prototype physics-based experiences. The Beta version is set to release in Q3 this year, at which point you’ll be able to publish islands using the feature.
To get started, check out the blog at Fortnite Creator Portal News and the documentation and release notes at 35.00 Fortnite Ecosystem Updates and Release Notes | Unreal Editor for Fortnite Documentation | Epic Developer Community