As stated in the unity 2019.3 release notes and promo website, Unity now supports Vulkan on Quest using Multiview and FFR (Fixed Foveated Rendering)
"Vulkan is now enabled on Oculus Quest, using multiview Fixed Foveated Rendering (FFR). This enables developers to deliver higher quality experiences with more control over the GPU and lower CPU usage."
However there is no explanation of how to enable FFR on Quest using Vulkan Multiview AND Unity XR Management with the Oculus Loader Plugin Package.
Does anyone have a link to any documentation on it?