The RadTaskBoard control does not provide such a compact view. You could try to achieve it using custom code. In a few words, the RadTaskBoardCard exposes ContentTemplate property. Inside you can place TextBlock and bind its visibility property to property from your viewmodel.
To better demonstrate this I have prepared a sample project and attached it here. The attached project uses NoXAML binaries with a Fluent theme applied. When you run the project click on the CheckBox in the upper left corner.
Regards,
Dinko
Progress Telerik
Progress is here for your business, like always. Read more about the measures we are taking to ensure business continuity and help fight the COVID-19 pandemic. Our thoughts here at Progress are with those affected by the outbreak.