You’d “easily” be able to create your own by editing your key commands JSON file.
Here is a (very) old post explaining how to do it:
From a quick experiment, I think you need to add:
UI.InvokePropertyChangeValue?Type=kNoteOrRestEndsVoice&Value=string: “kEndImmediately” (to switch it on)
and
UI.InvokePropertyEnableSwitch?Type=kNoteOrRestEndsVoice&Value=false (to switch it off)