Problem Definition

The new issue view in Jira Software includes the a button to create a sub-task and the old issue view for Jira Service Desk includes the Create sub-task option in the ellipses menu.

Neither of these are available in the new issue view in Jira Service Desk.

Current Jira Software (new issue view):

Current Jira Service Desk (old issue view):

Suggested Solution

Include the create sub-task button in the Jira Service Desk new issue view.

Workaround

Switch to the old issue view to access the Create sub-task option in the ellipses menu