Hi!
I use to listen to podcasts while going to sleep. The Spotify app has the nice feature to enable sleep timer after the current playing track. Would be nice if this option existed in the Sonos app as well, so I dont have to use Spotify for this and connect the speakers everytime.
Thanks! 
Couldn’t you just load one (or more) chosen podcasts into the speaker queue and let it just get to the end and stop?
If you do know the actual podcast ‘playing time’ too, you could maybe use the Sonos App sleep timer feature instead…
https://support.sonos.com/s/article/3552
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