If your podcast does not appear in iTunes or your new published episodes are not updated in Apple Podcasts (iTunes), please do the following:

1. Verify your feed on castfeedvalidator.com and make sure your feed is valid.

2. Submit your feed to Apple Podcasts (iTunes). If Apple Podcasts (iTunes) shows the feed has been submitted, please be patient.  Apple Podcasts (iTunes) will usually update your feed within a couple of days.

3. If the feed is still denied by Apple Podcasts (iTunes) when the feed is valid, you'll need to contact Apple Podcasts(iTunes) to check the issue.

4. If you switch your podcast from another platform and want to keep the previous existing Apple Podcast link, you'll need to update the feed on your Apple podcasts settings to show all your new published episodes. Please refer to Apple Podcasts' guidance to do that:
https://help.apple.com/itc/podcasts_connect/#/itca489031e0