How to track status of MacBook TouchID for Chrome Desktop?

Hi @apowers313, 

Thanks for putting this repo together. It's immensely heplful!

I was wondering how the status of MacBook TouchID as a platform authenticator could be tracked for different User Agents.

For example, it's supposedly working since Chrome Desktop 70+: https://www.chromestatus.com/feature/5962264427364352.

Thoughts?