Latest Episode Only feed is a special feed that will only show your latest 1 episode, as needed for Alexa Flash Briefings. You can submit this feed for your Alexa Flash Briefing while using your full feed for all other sources where you want all episodes to show.
The format of your latest episode feed is https://feed.podbean.com/subdomain/last1/feed.xml
Replace the "subdomain" in the above link with your own Podbean subdomain or own domain.
For example: Podcast URL: podcast.podbean.com ("podcast" is subdomain ).
Then the latest episode feed is https://feed.podbean.com/podcast/last1/feed.xml
Read more about what an Alexa Flash Briefing is and how to set one up for your podcast.