See this blog post from Simon Richert on the Power BI Community on how to combine scorecards spanning multiple workspaces in the same Power BI app.
In organizations, it’s common to organize Power BI content across multiple workspaces. For instance, various divisions (HR, Finance, Operations etc.) may have one or more workspaces where teams maintain their own scorecards, reports, and datasets. Scorecards are a great way to create a bird’s eye view of your company’s operational goals and key business metrics. So, what if you wanted to create a consolidated view of several scorecards in a single application?