Yeah I know what you mean. If you have backgrounds or overlays which are STILL in review, the story that isn’t published won’t show up on the app preview until the backgrounds/overlays have been approved.
This is something I have found out, if the first chapter has backgrounds/overlays which are still in review, it won’t show up. After they’ve been approved, you can use as many backgrounds and overlays which are in review and still preview them. Hope this helped 