Model a non- assetizable attribute on the technical product to hold the identifiers configure both orchestration items for provisioning on the same swimlane

Create a Callout that uses a customer adaptor. This adaptor is implemented in Apex and can make both callouts and keep the identifier in memory in between callouts

Implement the integration using an integration procedure, which can make both callouts, and pass identifier as a variable from one step to another

Implement the multiple call logic in Enterprise service Bus and have a single callout to the ESB in orchestration