Sending purchase data from Ventrata to GA4 via GTM - but revenue data is not displayed

Hi there,

we are in urgent need for your valuable help. We are currently sending purchase data from Ventrata (a booking tool) via GTM to GA4. Attached I have a test booking with the event from GTM, the received event in GA4 and the report for purchases and their value in GA4.

There you see that the revenue is not displayed and we dont understand why but the value element is being send to GA4 as shown in the screenshots.