From Apple ARKit documentation (Augmented Reality - Apple Developer):
“You can take advantage of the optimizations for ARKit in Metal, SceneKit, and third-party tools like Unity and Unreal Engine”
Is this supported available already? Can someone point to any tutorials/demos? If not, how soon will it be available?
As announced in this article(AR And VR For The Rest of Us), you can try an experimental early preview already.
You need to have your github account linked to your unrealengine.com account (as instructed in Unreal Engine on GitHub - Unreal Engine ) to access it. Make sure you have logged in github and click on this github link: https://github.com/EpicGames/UnrealEngine/tree/dev-ar-kit