how to make a sidebar in swiftui macos code example

Example 1: how to add icon in the app bar in flutter

AppBar(  title: Text("Hello Appbar"),  leading: Icon(    Icons.menu,  ),);

Example 2: can i add color on icon using xaml xamarin forms

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
         xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
         xmlns:iconize="clr-namespace:FormsPlugin.Iconize;assembly=FormsPlugin.Iconize"
         x:Class="Iconize.FormsSample.Page1"
         Title="{Binding FontFamily}">

  <ContentPage.ToolbarItems>
    <iconize:IconToolbarItem Command="{Binding ModalTestCommand}" Icon="fa-500px" />
    <iconize:IconToolbarItem Command="{Binding VisibleTestCommand}" Icon="fa-500px" IconColor="Red" />
    <iconize:IconToolbarItem Command="{Binding VisibleTestCommand}" Icon="fa-500px" IsVisible="{Binding VisibleTest}" />
  </ContentPage.ToolbarItems>
  <ListView CachingStrategy="RecycleElement" ItemsSource="{Binding Characters}">
    <ListView.ItemTemplate>
      <DataTemplate>
        <ViewCell>
          <StackLayout Orientation="Horizontal">
            <iconize:IconImage HeightRequest="20" Icon="{Binding Key}" IconColor="Blue" WidthRequest="20" />
            <iconize:IconImage HeightRequest="20" Icon="{Binding Key}" BackgroundColor="Blue" IconColor="Yellow" WidthRequest="20" IconSize="10" />
            <iconize:IconButton FontSize="20" Text="{Binding Key}" TextColor="Red" WidthRequest="48" />
            <iconize:IconLabel FontSize="20" Text="{Binding Key}" TextColor="Green" VerticalTextAlignment="Center" />
            <Label Text="{Binding Key}" VerticalTextAlignment="Center" />
          </StackLayout>
        </ViewCell>
      </DataTemplate>
    </ListView.ItemTemplate>
  </ListView>
</ContentPage>