I checked in "Inventory valuation", I see my transaction, but it shows that it is in "Partner Locations/Customers", but not in "Partner name".

Do I have to create stock for each client?

Hi,

Go to Inventory --> Configuration --> Settings

Select the Warehouses and Locations usage level.
Then go to Inventory --> Reports --> Inventory valuation

There you can see location vice products.

Note: internal locations are filtered in the view. you can remove that filtration to see all locations, including partner locations.

Thank you.