I would like to be able to send a unique tracking updates for orders which have multiple items and travelling on their own consignment.

Eg I send a customer 1 shipment with 2 parcels (2 tracking numbers). They unfortunately split along their delivery journey. 1st parcel is delivered on Monday and sends the customer a delivered scan as 1 of 2 items delivered. I want to be able to track the whereabouts of the the second item as well as receive notifications for this one too.