Cloning checklists with Jira issues
Whenever you clone a Jira issue, all of the checklists that existed in the issue will be cloned as well. Simply choose the issue with the checklist that you want to clone. From the menu select Clone and confirm by clicking create.
The checklist will be automatically added to the cloned issue.
Bear in mind, it will be a brand new checklist – no checklist history, item history nor the statuses will be cloned.