The breadcrumb displays the exact path of the product(including the category) only if the PRIMARY CATEGORY checkbox is checked inside the Commerce category record in Netsuite.
If the PRIMARY CATEGORY checkbox is not checked for the items inside the Commerce category record, then the path of the PDP page will be “Home/ Product name”.
An item can have only one primary category. In case this item is to be displayed in multiple commerce categories, then even though the item will be displayed in multiple categories, the path of the item in PDP will be that of the primary category.
So, to display the exact path of the products in PDP, please update the commerce category records as per the requirement.