Hi,

As you know, We don't have a built-in dashboard with Pivot or graph view in odoo. There are a few custom addons available in the odoo app store which adds these features in the portal view. Unfortunately, none of them was found related to manufacturing. 

However, it can be done upon customization and proper understanding of the requirement.

FYI on how to give access to such a dashboard for a portal user, you can check this module.

Thanks