Live Posts appear on the Connect tab. You will receive notifications for "likes" on your post, and you can review public poll responses by tapping on the post.
As an author, you may update or delete a live Post by selecting the Ellipsis -> Edit or Delete.
From the Connect tab, you may also edit a scheduled post before it goes live by selecting "Scheduled Post" button.
Select the title "Creating KB article." of the post to edit the content or the ellipsis, which will give you the option to delete the post.