To get the Podcorn analytics prefix added to your Buzzsprout RSS feed, contact the Buzzsprout team at firstname.lastname@example.org and ask them to insert the https://pdcn.co/e/ prefix to the episode <enclosures> tags in your RSS Feed.
Here's an email template you can copy and paste:
My podcast name is [name of show].
The documentation for this prefix is available here: https://podcorn.com/analytics-prefix/.
Once they've confirmed that the prefix has been added, your episode analytics should begin displaying in your Podcorn dashboard within 24 hours or so.