You might wonder why some change you have made—like updating an image or posting a new episode—isn't showing up yet in iTunes, as this can be a source of concern or frustration.
Pippa updates your feed immediately, as soon as you make any changes. And these changes will be available immediately to anyone who accesses your feed directly or any subscribers who refresh the feed.
However, various players (like Apple Podcasts, Google Play, Overcast etc.) take a bit of time to process the changes on their side, as much as 24 hours.
So, if you've published an episode, you see it in your feed, but it's not yet in iTunes (or wherever), it's most likely that they just haven't processed the change yet.
There is one way you can expedite this process: Refresh your feed in Apple Podcasts Connect.