Hamburger menu with Mvvm Navi

Hi Guys i want to do an app with master detail page navigation

I have looked at the example here but it does not seem to follow Mvvm principles since navigation does not happen in a viewmodel

https://docs.microsoft.com/en-us/xamarin/xamarin-forms/app-fundamentals/navigation/master-detail-page

I normally run a navigationservice and call that from my viewmodels in order to move from page to page.

How do i combine the two?

Any help would be greatly appreciated