I have installed the package and I try to use EventToCommandBehavior
I add
TextColor="White"
BackgroundColor="{StaticResource NormalButtonBackgroundColor}">
Command="{Binding IncrementCommand}" />
to my xaml and
xmlns:xct="http://xamarin.com/schemas/2020/toolkit"
But I have an error

If I use the xct in csharp, it works
Able to use the xct
Does not recognize xaml tags
This is not available yet in the pre-release packages only in the nightlies for now. It should be available for -pre5, so hold on a little longer! :)