20H1+ native third party assistant support

So the BBC launched the beeb assitant as beta on the Windows Store and it only runs on 20H1. The interesting thing in this beta is that Beeb app uses an API in 20H1 which lets it respond to ‘Ok Beeb’ even when it’s not running. The app is a UWP runtime app, so it seems there is a way for native third party voice assistants to hook into keyword wakeup.

I know this is for a very limited market of users, but capability is something new I haven’t heard of, only that Cortana was being set as a standalone app.