There is no way to add sub-tasks to epics using the new issue view.

Issue Summary

Using the "old" issue view, sub-tasks can be added to Epics using the "more(...)" button at the top-right of the screen.

There is no way to add sub-tasks to epics using the new issue view.

Environment

Jira Software cloud

Steps to Reproduce

1. Enable the new issue view
2. Create a Jira Software classic project
3. Add an Epic to this project
4. Click more(...) at the top-right of the screen

Expected Results

The option Create sub-task is visible

Actual Results

The option Create sub-task is not visible

https://cl.ly/b3012ffc4053

Notes

Workaround

Disable the new issue view by following the steps described below (not applicable for next-gen projects):

1. Go to Jira home page and click on the avatar at the bottom-left of the screen and then click on Personal settings
2. Under Jira labs, next to New Jira issue view for software projects, disable this feature by clicking on the green button (it will become gray and a feedback pop-up will appear)