Dynamic Delivery Label using target data in Adobe Campaign Standard

Hi Team,

We are trying to do a dynamic delivery label for the recurring delivery.

We tried to add the target data into the delivery parameters but we can see only 3 event variables which can be selected.

Once we add our target data we know that we can use the below option to create a dynamic label.

So we need to know how we can add a field from target data from previous transition to the Delivery parameters which then can be used to create a dynamic label.

Thanks!