Recreating this because Clickup marked it as "Not on the Roadmap":

Currently, when duplicating a task or subtask, you can only select the Space and List where you want to duplicate it. So if you're duplicating a subtask... good luck pinpointing where you want it! The only workaround at the moment is to choose the List, find your duplicated subtask, and move it under the task you actually need.

I'm hoping we can get another level to choose from so you can specify under which task you want to copy those subtasks over.

Thank you!