They haven't even made a public statement.
And now we get the news that they are working on another API. It doesn't really matter that the new API is targeting a completely different market to Vulkan. It doesn't really matter that a WebVulkan can't really exist in the first place. It doesn't matter if this is probally the correct starting point for a NextGen web graphics API.
It doesn't even matter that the team at apple proposing this API is not the same team that would be responsible implementing Vulkan in OSX.
People just want Vulkan on MacOS and/or IOS.