Firebase analytics doesnt work

Hi all,
I follow this tuto : https://medium.com/firebase-developers/firebase-analytics-on-xamarin-forms-c60ae8bbb24a
To add firebase analitycs and event on my xamarin.forms app. But i got no result on the Debug View of firebase console.
To Add my xamarin.forms app in firebase i skip this step (for Android):

Is it replace by another step ?
Same question for the Ios part