I found this feature as most convenient in Android 14 i.e separate volume adjustment for Ringtone and Notification.The sliders are now more equally divided into Ringtone,Alarm,Media,call and Notification.
Previously there was a Ring and Notification volume together which adjusts volume for both.In Android 14 more control was added where separate volume sliders are added for Ringtone and Notification.
This sounds more convenient because I prefer lower notification volume and higher ringtone volume so now I can adjust as I wish.
This feature is available on all smartphones running Android 14.
If you want to try more new features before public release join Android 14 QPR1 beta.Here is a quick guide for joining Android 14 QPR1 Beta.