Dynamic Delivery

Hi,

we are trying to use the new workflow feature, of getting parameters as input.
We are following this walktrough tutorial in order to see how the parameter can be used in the particolar context of customizing a delivery:

https://docs.adobe.com/content/help/en/campaign-standard/using/managing-processes-and-data/workflow-general-operation/calling-a-workflow-with-external-parameters.html#customizing-activities-with-events-variables

Our use case is quite different, somehow simpler, but we are stuck on it and we wonder if and how it can be implemented using ACS feature: the workflow should take as input a single parameter, the delivery object id (es: "DM13312") .
The delivery is already build and prepared (audience selected, HTML tested etc etc) and we simply need to trigger the "send" operation.

We trying in many ways, using the "dynamic template" option, but it seem not really working.

Do you have any suggestion?

Thx

Fabio