As it's possible to host through Zuuvi but also outside of Zuuvi, it means there are two ways of exporting your ads.
As an example below, you can see the export for Google Marketing Platform. It's the same workflow for any of the other DSPs - except Google Ads as it's not possible to host outside of Google Ads.
When hosting through Zuuvi choose the one to the left <-
When hosting outside of Zuuvi choose the one to the right (Packed) ->