Understanding PPU Storage

Hi Power BI Community,

Trying to understand how much Data is stored in the different WorkSpaces that we created and use in Power BI.

For Pro - We get an below message when I navigate to Manager Group Storage

For PPU - I get below message

What I'm trying to understand is where is the data stored in PPU and why does it say 0 MB used out of 10 GB, even though the dataset size is greater than 1GB. If any one can explain in details it would be really helpful.

Thanks in Advance