Production App: This refers to the final version of the app that has been released to users and is actively being used.
Package Name: A unique identifier for the app on the Android platform. It is used by the system to differentiate between different apps and to manage their installation, updates, and permissions.
Is this not possible for we can do it of requesting play console
Solution
Once you publish an app with com.exmaple.xyc package name onto the playstore, it can be changed (but highly recommmend not to). Reasons:
If you change the package name in the latest version then the users of the previous version won't receive the update. They would have to unistall and install the new version. Since google will consider it to be a new app.
You will lose your existing downloads and rating and reviews, along with your store ratings associated with your original app.