This message "This event is yet to launch" will appear for anyone trying to access the event URL before you publish your event.
How to share the event before you publish it?
You may want to share how your event looks and feels with your collaborators before you announce it to the world.
To do this, you can share the preview URL instead of the official event page URL:
Navigate to your event
Click preview from the top right
Copy the preview URL from the event page you are previewing. It should be a very long URL that looks like this "...humanitix.com/...?token=..."
Share this preview URL with your collaborators