DataTemplate with TemplateSelector - bind to parent command

Hi all

I have a ListView with a TemplateSelector and two different DataTemplates (ViewCells). Behind the ListView is a ViewModel for the ConentPage with an ObservableCollection which contains some item-models. The Binding to this Item-Model in my templates work like a charm.

What I want: My ContentPage-ViewModel has some commands. The DataTemplate should use this command. How can I bind to this commands?

I know, that I can make the commands static and reference with x:Static to it. Or I can add the Command to my Item-Model. But both are no Option for my solution.

Thanks in advance