We use ListenNotes to search for the available public podcasts.
If you don't find a podcast on the app, you can submit it using the following link:
https://www.listennotes.com/submit/?url=https%3A%2F%2Ffeeds.buzzsprout.com%2F2465591.rss
You need to provider:
The RSS feed of the podcast
Your email address so you are notified when the podcast is available.
Private rss feed
If you want to add a private RSS feed, checkout the instructions here