You can save drafts, and even after publishing, you have the ability to edit or unpublish articles through the 3-dot menu on your timeline. Distribution and Visibility
Navigate to the section in the side navigation bar on the web version (x.com). Click Write to open the composer. You can save drafts, and even after publishing,
An "1868x" article likely refers to the feature (formerly Twitter), which allows Premium+ subscribers and Verified Organizations to publish long-form, multimedia-rich content directly on the platform. What is an X Article? You can save drafts