We received the following notice from Apple Podcasts late yesterday night:

Apple Podcasts-holiday

If you’ve recently started a new podcast and haven’t submitted it to Apple Podcasts yet you need to do that today or wait until the 27th. ¬†Also during the 21st to 27th window changes to show level metadata (images, show title, show description, etc) and the release of new episodes will be delayed and slower than normal in showing up in the Apple Podcasts Store.