The most notable new Vulkan API extension introduced today is VK_VALVE_fragment_density_map_layered. This Valve vendor extension was worked on by well known open-source developers Connor Abbott and Mike Blumenkrantz. This extension enables the use of layered fragment density maps.
The other new extension is VK_OHOS_surface that was worked on hy Huawei engineers. The VK_OHOS_surface extension allows creating a Vulkan surface object that refers to an OH native window for their Open Harmony OS. This can be used for the system window compositor, video encoders, and application-specific compositors on Open Harmony OS, the operating system for IoT and embedded devices worked on by Huawei.
More details on today's Vulkan 1.4.318 spec update via Vulkan-Docs .