Hello,

Luke from the Product team here. Thanks for submitting this feature request. 

Although we don't provide this as a prebuilt report, you can get this data by creating a custom report with our connector. You can create custom reports from your connection's setup form. To get the data you're looking for you should select country as a breakdown and either campaign_id or campaign_name as fields (or both). Then you can add whatever metrics you need in your report too. That will give you country-level data by campaign. 

You can contact our support team if you need assistance setting this up: https://support.fivetran.com/hc/en-us.

Cheers,
Luke