Copy Subitems to another item

Need a way to copy subitems from one item to another. You can move them from one item to another currently, but I want to keep them on the original item and still copy them to another. The workaround now is to duplicate said item, then move the tasks to another item, then delete the copy of the original item, which is annoying. This should be a fairly basic task to implement.

This feature would be really useful.

Just a button called “Copy to” next to “Move to”.