I’m sure you know the answer to your question.
And if you think about it with the new iPhone X, it is kinda redundant to have the swipe down to have Cover Sheet music controls, and swiping on the right ear brings down Control Center music controls.
But if I recall correctly, the Now Playing controls in the Control Center can have multiple Now Playing panes with AirPlay 2, it’s also where you manage all volumes, paired devices, and streaming content.