Where can I find the new Project Templates?

Hi,

I am looking for information to improve my Burger Menu (Master-Detail-Page).

I read this article. => blog.xamarin.com/new-xamarin-android-ios-templates

I would like to get closer to the visual. Can we do the same with Xamarin Forms ?

This is what I have:
us.v-cdn.net/5019960/uploads/editor/eh/3k6d3vs0kc2n.jpg

This is what I want:
us.v-cdn.net/5019960/uploads/editor/wn/75ris8hoaii0.png

How can I have a separation bar?
The reader talk about a template, where can I find them ?

Thank you for the help.
Zebiphire