iTunes Store takes up to 24 hours to show new episodes once you add them to your RSS feed. If after 24 hours you still don't see your new episode:
- Check the status of your podcast in Podcasts Connect.
- Verify your episodes are dated and ordered correctly.
- If no errors display, click the "Refresh Feed" link to request an update.
However, your subscribers will see the new episode in the Apple Podcast App shortly after it publication.