Hi @vikram!
Welcome to our community!
The tracking number should be available after generating the Label, and it’s provided by the carrier.
If you already have a label and the tracking number then you can send it to ShipHero using the shipments create Mutation.
But you will need to know the tracking number beforehand, we don’t generate it with this mutation or any other, labels have to be created using ShipHero App, but not the Public API.
You could then retrieve the tracking number using a Query or a Webhook
In case it helps there is another post that might also help:
Please let us know if that doesn’t help!
Thanks in advance!
Tom