How can I automatically create an issue in another project when a transition is executed?

[Marianna Terto]

How can I automatically create an issue in another project when a transition is executed?

[Nic Brough -Adaptavist-]

You will need to find or write an App that can provide a post-function or listener to catch the transition and create the issue.  Or possibly a web-hook on the transition.

[Marianna Terto]

Is possible execute this with Script Runner for Jira Cloud?

[Nic Brough -Adaptavist-]

Yes, that can provide the post-function you need.  If it's a simple case, it can do it without you writing any code.