Carrier data usage - how?

[SoN1NjA]

One of the things shown off with iOS 11 is Carrier data usage, but where or how can I access that? It's to the right of One-handed keyboard in the slide

 

[iFanaddic]

One of the things shown off with iOS 11 is Carrier data usage, but where or how can I access that? It's to the right of One-handed keyboard in the slide

I’m also wondering what they meant. Nothing seems to have changed with data management.