New Preview Features - Tag app as "monitored"

I watched the excellent session from Alex Esibov at Ignite 2019 called - "THR2058 - Discover and control Shadow IT across your organization" 

https://myignite.techcommunity.microsoft.com/sessions/79741?source=sessions

Where can I find documentation in relation to the new features of Monitoring apps etc - I can see no mention of them in the existing documentation or release notes reflecting that these features are now actually in preview?

Is it private or public preview these features are in, and if it's public preview, when are they due to go live for preview users?

Thanks

Paul