Thanks @ironikus for the quick detailed reply.
To understand correctly, I have a trigger on post_create and configured with the option “Trigger on initial post status change” set to “Published”.
The aim is to only call the trigger, when a post is published.
However, I don’t want it to be triggered again when an already published post is updated.
If I understand you correctly, I should add the custom field “wpwhpro_create_post_temp_status” to such post and set it to true? This will prevent the webhook from being triggered again?