MainPage.xaml

<?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:local="clr-namespace:VisualTest"
             x:Class="VisualTest.MainPage"
             Visual="Material">
    
    <ContentPage.BindingContext>
        <local:MainViewModel/>
    </ContentPage.BindingContext>

    <StackLayout Padding="10">
        
        <Label Text="Visual Teste"
               HorizontalTextAlignment="Center"
               FontAttributes="Bold"
               TextColor="Black"/>
        
        <Entry Text="{Binding Item}"
               HorizontalTextAlignment="Center"
               Placeholder="Seu item aparecera aqui"
               HeightRequest="60"/>

        <Picker ItemsSource="{Binding Items}"
                SelectedIndex="{Binding Item}"
                Title="Selecione um cumprimento"
                Visual="Test"/>
    </StackLayout>

</ContentPage>