Cross site Connections
You can setup connection between 2 Jira sites to facilitate project migration, Jira configurations clone
To connect two different sites, Revyz Cloud Configuration Manager app should be installed in both the sites to make a connection

Click on add connection
Enter connection name
Enter site url
Click on Generate connection token
Copy that token

Open destination site & click on Activate connection
Paste copied API token and click on “Activate”
You can see status as “Active” on source site. It confirms that connection between source and destination site is successful