Service Desk ticket no. in Service Catalog ticket

Hello Team,

As part of configuring access requests, we have configured both Service Catalog and Service Desk Connectors.
When an end user is raising access request, ticket 1 is triggered from ServiceNow to SailPoint for Provisioning purpose.
If the requested access pertains to disconnected application, SailPoint is triggering ticket 2 via SDIM to application team for their taking action.
When ticket 2 is closed, automatically ticket 1 is closed so that the end user is updated about his request.

However, now the business requirement is as under:
End User wants to track the status of ticket 2. However, he has only ticket 1 number.
Is there a way wherein the end user could get the ticket 2 number from ticket 1 itself ?
Is there any particular field that is linking these 2 tickets which we could take leverage of.

Thanks,
Kartheek