MainPage.xaml

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="FaceSample.MainPage">

    <StackLayout>
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition />
                <ColumnDefinition />
            </Grid.ColumnDefinitions>
            <StackLayout Grid.Column="0" Margin="5">
                <Frame><ImageButton x:Name="FirstImage" HeightRequest="100" Clicked="FirstImage_Clicked" Source="avatar_first.png"/></Frame>
            </StackLayout>
            <StackLayout Grid.Column="1" Margin="5">
                <Frame><ImageButton x:Name="SecondImage" HeightRequest="100" Clicked="SecondImage_Clicked" Source="avatar_second.png"/></Frame>
            </StackLayout>
        </Grid>
        <StackLayout
            Orientation="Vertical"
            Padding="20">
            <Button x:Name="MatchButton" Text="Match" Clicked="MatchFaces_Clicked" Margin="5"/>
            <Button x:Name="LivenessButton" Text="Liveness" Clicked="Liveness_Clicked" Margin="5"/>
            <Button x:Name="ClearButton" Text="Clear" Clicked="Clear_Clicked" Margin="5"/>
        </StackLayout>
        <StackLayout Padding="20">
            <Label x:Name="SimilarityLabel" Text="Similarity: null"/>
            <Label x:Name="LivenessLabel" Text="Liveness: null"/>
        </StackLayout>
    </StackLayout>
</ContentPage>