How to get Hamburger Icon in iOS?

I've got the icon, and it shows in the Navigation for Android, but I can't see it for iOS. How do I get the Hamburger Icon in iOS?

It's loaded in my Menu.xaml (Master)

<ContentPage
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    x:Class="FutureState.AppCore.Pages.MainMenu"
    Title="Breathing Room" Icon="ic_drawer_light.png">

The icon is located in my iOS/Resources directory as Bundle / Do Not Copy, and it's in there twice... once as ic_drawer_light.png and once as ic_drawer_light@2x.png

Am I missing something?