I'm not surprised it exists, since there are a lot of VR games to port over to Vision Pro. And I'm not surprised that Apple has kept quiet about it, since everything about the unveiling of Vision Pro has been to clearly position it as different to VR, even though it's clearly capable of producing VR experiences.
But I am surprised that the first and only mention of it is one sentence in a press release! Hopefully those developers are able to show something soon.