Hi Brad,
With the inquiry from you. As far as I know. It is only possible to embedded the custom/SAP report into the UI screen without passing the parameters, here it is AccountID.
Since I don’t think there is appropriate inport parameters for the ICP_ANA standard EC to allow the report displayed with restricted customer ID.
However, for the sure answer you might wait for the feedback from SAP Dev team.
Hope this can give you clues of it. Thanks!
Best Regards,
Qiang Zhu