You can easily make one or multiple Unlisted documents Public as shown below:
- Go to Publications from Side Navigation Menu and click the Publication you want to make Public and you will be directed to the Publishing Workspace
- Under Publication Overview, click EDIT in-front of AVAILABILITY
- Select Public
- Click APPLY CHANGES
NOTE: The Public content will be live and available for everyone. Once the content is made Public, it can not revert back to Unlisted/Private.
Please see article for more information: Making Public Content Unlisted.