Envolved with well-marked process with many teams, each one with a project that is related with others teams, we had the necessity of some automations to facilitate and speed up the daily work on Jira Cloud Platform.
For this, the principal automation required and created was an script in groovy atuomation in Script Runner that copy an issue with same name and type from one project to other when it reach some specific status like status "Ready do Release" from project "DEV" to "PRODUCTION", maintaning same related taks for all projects envolved and eliminating the process of create the same issue on various different projects.
I hope help you all too! :)
Check on: https://github.com/GTessarini/JiraAutomations