We have a WordPress based News Website... A few months back we started customizing the website (some changes in the Post and page layout and look) on a copy/Staging Website and also kept adding new News/Posts, Pages on Old Original Website. On Old website, we have thousands of posts and pages grown up with the passage of time.
Now, when we are planning to make the website live, we want to have (Keep) these posts, but obviously if we will replace/deploy from the Staging to Live we will loose these posts as on Staging we never added New Posts. Writing/Adding these posts and pages on the newly migrated website will be a trouble, so how we can handle this situation where we do not loose our Pages and Posts. Away can be to use the Plugins like WP Exporter but don't it affect the Layout of the Pages and Posts as we have also done some customizations on the Pages/Posts on Staging Website. Please advise with the most efficient solution. Thanks in advance!