It is possible with IBIS AMI models to output internal states as ami parameters. All the SystemVue examples I have seen use parameters as inputs and I haven't been able to work out how to set parameters as outputs.
In the AMI Model Specific Parameters tab for the C++ code generator it seems the possibility of parameters as Out might be available but it is always greyed out.
The youtube video uploaded by Keysight suggests it is possible to output AMI parameters. But doesn't go into details. It isn't clear if this example is available.