It is necessary that you have the rights to see the contacts in the access to data (not project dependent) and that you also have the right to define users as followers in the specific access section access to resource data.

You must register your contact as a user to receive the desired information and then register him for the follow-up of the delivery in question in the tools of the detail area thereof.

thanks you for your response

I thought the list contained the related items and not the tracked items.