Hi,
On the main platform it can be configured using the cart layout, but on portal it's built in to the widget.
This community post gives good instructions on how to clone and edit the widget, but they are looking at a different widget than the one you're looking at.
If I'm not mistaken the widget you'd like to change for the above image is here: YOURINSTANCE.service-now.com/sp_config?id=widget_editor&sys_id=86eb2c8e9f4332002528d4b4232e708a
And the estimated delivery is at line 28 in the HTML Template. This widget is called SC Order Status.
If you haven't really edited widgets or worked in HTML before, remember that commenting out a line in HTML is a different format than JavaScript.
And the portal page you want to edit is the order_status page, which you'll want to change in the Service Portal Designer (try going here: YOURINSTANCE.service-now.com/$spd.do#/sp/editor/order_status/eab0f4029f8332002528d4b4232e7065 to switch out the widget with your edited cloned widget)
Hope this helps!
