Cloning Issue Layouts

While we clone issue screens it is not possible to clone the issue layout you have configured in one project to another project.
You can copy the layout manually (in company-managed projects) to your target project using the Jira function under Project settings > Layout > Edit issue layout > Copy issue layout.

We are not able to clone issue layouts because the issue layout is not accessible via REST API. You can vote and comment to let Atlassian know if you need this feature.