It is linked because it was covered in the keynote.
And what is new is that it looks to become a widely supported FIDO standard i.e. Google/Microsoft are onboard whereas before it was an iOS/macOS only technology.
I'm sort of expecting Google to follow suit with the next Android release, and perhaps Microsoft after that when the next iteration of Windows 11 drops (or at the same time, as Microsoft doesn't have a mobile market and relies on Android and iOS integrations).
And what is new is that it looks to become a widely supported FIDO standard i.e. Google/Microsoft are onboard whereas before it was an iOS/macOS only technology.