Show Multiple Headings for nested Row in Matrix Visual

Hi  Don-Bot 
Thanks for reaching out to the Microsoft fabric community forum. 

I would also take a moment to thank MasonMA   , for actively participating in the community forum and for the solutions you’ve been sharing in the community forum. Your contributions make a real difference.

I tried reproducing this scenario using sample data

In Format pane-> Row headers->Turn off“+/- icons”

Set Layout = Tabular

Right-click any country, Expand all down one level in the hierarchy

Please go through the pbix file.

If I misunderstand your needs or you still have problems on it, please feel free to let us know.   

Best Regards, 
Community Support Team