Perform custom action after post is publish using form

Hi,
I am using the form shortcode to enable users to publish pods in frontend. This part is working fine. But I also have the Post Expirator installed which automatically sets an expire date. But it does not work when I publish pods with the form.
I’ve found this code to programmatically setting up the expirator but I don’t know where to put it.

So, my question is: Is there a hook that runs immediately after the pods is published and also I would need the pod id for this to work.