Power Scripts™ – Jira script automation
JIRA PowerScript Sctipts Plugin is a very useful plugin if you want to automate tasks while working with Jira projects to save time on repetitive tasks. The most important features are the ability to automate repetitive tasks, scripts added to the workflow, transit, and event listener.
It can be found on atlassian marketplace under this link. Unfortunately, it is not free, but the price is very affordable.