This article explains how to sync the Created Date field.
The Created Date field is quite specific, as you probably won't change its original value on an issue.
You can sync the created date into other fields like description, comment, or a custom field.
Send the created date to the remote side using the code below:
You can set the received created date in different fields as follows:
Set the received value in a created date (applicable only for Jira Server)
Set the received value in a description
Set the received value in a custom field
Exalate for GitHub app does not support the Created Date field update on a GitHub issue. But you can store the received Created Date field value in a Custom Field.