Why Supplier Solicitation mail for the campaign arrives without information?

Summary:

I need to send a copy of the Supplier Solicitation mail to another involved party.

I built a GTM CAMPAIGN Agent Type that sends campaign notification, I have used the SEND CAMPAIGN NOTIFICATION agent action to send to the supplier as standard configuration. This Supplier Solicitation mail is working well.

To send a copy of the Supplier Solicitation mail, I am using NOTIFY INVOLVED PARTY agent action. This mail arrives without information.

What other thing needs to be set up to receive the information of the campaign in the Supplier Solicitation mail?

Content (please ensure you mask any confidential information):