Is it possible to sync Octane Epics+ US with Jira Epics+Stories creating a relaction between them?

In Octane, we have Epics-Features-US relation. What my customer needs is, create this Epics and US in Jira saving the relation between them without the need of feature. In other words, he wants to create the relation from Octane´s Epics-Features-US to Epics-US in Jira

is it possible?

regards