Posted by Google has quietly added new rich results markup for podcasts in the developer center.
Google says, “You can enable your podcast to appear in Google Search results along with individual episode descriptions and an embedded player for each.” This will however only work for searches done on the Google Search app version 6.5 or higher on an Android device or on Google Home. Google said they do want to add “support for Chrome on Android soon.”
https://www.seroundtable.com/google-rich-results-for-podcasts-23618.html