When creating a delivery link from an idea in Jira Product Discovery, if the issue type is a subtask, there's currently no option to select which parent issue (workstream) it should be created under. The subtask gets created as an orphan, requiring manual re-parenting in the delivery project.
The delivery creation flow should allow selecting a parent issue when the chosen issue type supports hierarchy, so the subtask is placed in the correct workstream from the start.