Dashcard filter not showing a Board from same Workspace as filter criteria.

Hi. So I am 1 hour into Trello and I'm a little lost.. I am currently tasked to create a Dashcard on one List in a Board where that Dashcard should pull data from a List in another Board from the same Workspace.

The issue I am having is that when I create a filter criteria for the Dashcard that I am creating, I am only seeing the Board where this Dashcard is located. Not another Board in the same workspace.

Can I get some advise/help? Thanks!