Visualisation or pivot table by groups of data

Hi people!
I am new on the forum and think you guys are making amazing job helping us noobs.
Thanks in advance!
As the subject says, I have a data visualisation issue:
I would need a table in which I can see in turns: only the total results of a country / the total results of each zone slicing the country / the details of each entity.

It is the simplest action in Excel: grouping rows and developing the group at envy.
In powerby I don't have the trick!

Please help!