LINK LAYERS TO CHANGE THE CONTENT

There are two way a duplicating smart object layer.  One way create independent smart object layers the other way create smart object layers that share a single  object.  If the smart object layers share a single object all you need to do is replace the object using any of the layers and the content of all the layer will change.  The replacement object must be the exactly the same size and resolution of the object being replaced.   For all smart object layers have an associated transform that is not replaced or edited when you replace an object.  So there are three different transform for this single object.  For them to work correctly the replacement object must be exactly the same size and resolution as the original object.

You want to use  Laye>Duplicate Layer...  to create the smart object layers thate will share and onject.

You do not want to use Layer>Smart Objects>New Smart Object via Copy  that creates independant smart object layer

To replace the object you use Layer>Smart Objects>Replace Contents...

If you duplicated (Cmd + J) the Smart Object layer then altering the content of one layer would also change all the other layers.