Hello,
I really hope that I messed something up, because I can’t believe that this is a missing feature. On android I get a persistent notification when I cast something from plex to chromecast and even I get a different one when somebody else is casting and I can stop and mute the video from there (I know that this isn’t a plex feature but still). On ios there isn’t any notification. If this isn’t my fault and nobody has notification on ios, please create one because this is really annoying