Pop Over - Specific Dynamic URL + Visit Via Specific Referer

I’m allowing the user to create their own posts, and would like to display a popover with sharing options the first time they visit their own post.

They go through a post creation page so could use the specific referrer condition, BUT this wouldn't be ideal as if the user decided to navigate away from the page without creating the post the popover would display.

Any help/ideas would be highly appreciated!