How do I create a Google Sheets Report from Master Project of all projects?

We just upgraded to Business and looking more into the Portfolio feature, and exporting to Google Sheets for creating customized reports.

But when I export my Master Project/Board I get totals of all projects - not a list of all tasks along with assignees, etc. The Live Source Data gives me the same thing - totals. I don’t see anything that would allow me to run customized reports on assignees, due dates, etc.

We do have a setup where each project is really a client - and tasks under that client (project) are tasks for that one client.

Is this what’s affecting the reporting?

And if so, how can I get around it so I can see all of the data that’s contained within the Master Project/Board?