Page3.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:ShellTestMAUI9"
             x:DataType="local:MainViewModel"
             x:Class="ShellTestMAUI9.Page3"
             Title="OnNavigatedTo Test">

    <Shell.BackButtonBehavior >
        <BackButtonBehavior Command="{Binding GoBackCommand}" />
    </Shell.BackButtonBehavior>

    <ScrollView>
        <VerticalStackLayout
            Padding="30,0"
            Spacing="25">
            <Image
                Source="dotnet_bot.png"
                HeightRequest="185"
                Aspect="AspectFit"
                SemanticProperties.Description="dot net bot in a hovercraft number nine" />

            <Button
             x:Name="GoToSecondPage"
             Text="Go to second page"
             WidthRequest="150"
             Clicked="GoToSecondPage_Clicked"
             HorizontalOptions="Fill" />
        </VerticalStackLayout>
    </ScrollView>

</ContentPage>