It is possible to independently stream the image sensor in MxHub if the camera is added as an ONVIF camera with Stream Source set to Raw in the S74 Integration Protocols.
In MxHub you will need to add the camera as an ONVIF camera and make sure that 2-16 channels is also selected.
If these conditions are met you will see that there are two cameras available.
And they will appear as separate devices in the Management Client. In the Desk Client you can also assign them independently to layouts.