Your iTunes Store page is at https://podcasts.apple.com/podcast/adhdiscussions/id1492758426
In the Store and when subscribing the Description column shows the contents of your 'itunes:subtitle' tag, which is the same as your title. Clicking the 'i' to the right of this should show the 'itunes:summary' tag, which you don't have - it's been filled in with the contents of your 'description' tag in iTunes and with the subtitle in the Store. Is this where are the descriptions not showing? If it's in the iOS Podcasts app I don't have that to check, but perhaps that isn't filling in the missing 'itunes:summary' tag which you should enter the description in in each case.
(The titles are truncated because I narrowed the columns in order to keep this image to a reasonable size: they are there intact.)