Out of the box, there is no way to automatically expand the display on a CA SDM list page.
However, this can be achieved via a form customization using Web Screen Painter (WSP).
Open one of the list screens (list_XXXX.HTMPL) via WSP.
Enter the following code in the BODY tag of the form
This will cause the list to always be loaded with the list items expanded by default.
Please note that this since this is a customization, therefore is outside the scope of the standard CA Support provisions.