To preview topics that you've saved as a draft or that are set to be published in the future, navigate to the Topics tab from the Home page.
You will see tabs for all Open, Coming Soon, and Closed topics. Select the Coming Soon tab.
You will see all future or drafted topics designated with a Not Published tag in the top right corner. Topics in the Coming Soon tab are only visible to Site Admins unless you've selected the Show Coming Soon checkbox when creating the topic.