Check out how you can display the remote issue link on the issue view.
Exalate allows displaying the remote issue link on the issue view.
To display the remote issue link navigate to Connections- edit connection - Sync Rules tab - Advanced and select the desired link location. Update connection to save changes.
The remote issue link is not available in case the remote instance is not accessible from your side.
|Jira Server||Jira Cloud|
Display on the issue view
Remote issue tab
How to display the remote issue link in a custom field