I am learning to understand, how the binding mechanism works in XAML for .NET MAUI. I am assuming this is the same for all XAML projects, WPF, MAUI etc.

At the end is the whole XAML.

This XAML works fine:

<Button WidthRequest="150" Text="Add Activity" 
                Command="{Binding AddActivityEntityCommand}"
                IsEnabled="{Binding IsNotBusy}"
                Grid.Row="2"
                Margin="8"/>

• Is the reason why this works because the Button is part of the ContentPage, which has it's x:DataType set to MainPageViewModel, which is where the command lives?

• The Binding is set to AddActivityEntityCommand, while the actual method signature is
  async Task AddActivityEntityAsync(). How is this resolved? Since it obviously doesn't match the name, but it works. And what are the method signature requirements for this to work/being recognized?

This on the other hand, doesn't just work as easy out of the box:

<Label HorizontalOptions="End" TextColor="Red" Padding="0,0,10,0" Text="