Anybody has an idea on how to set the "The after-conversation period now begins the moment a call ends."? It seems that, even after the spring 21 release, the agent still has to close the Voice Call Record before they are available for another call.

I can see there is a pilot for setting up some buffer time between a call and another but it would be useless if they still need to close the record to be available for a new call. Here the link with the release notes https://help.salesforce.com/articleView?id=release-notes.rn_voice_acw.htm&type=5&release=230