For product variants (simple products listed under configurable products) there might be issue with URL links exported to Google Shopping feed.
To fix the issue you need to set simple products to export parent product URL link. To do that please follow the steps below.
1. Set URL link to parent URL export
Click Edit Profile button.
2. Set the filters up
Select Attribute filter
Set condition below:
Export Out of Stock Products to Yes
Stock Status Dependence to Qty only
Select Product filter and set Parent - Child to Childs only and Execute the profile.
Feel free to contact the Koongo support at firstname.lastname@example.org.