I have not seen this capability discussed in the FoCal documentation. Since FoCal knows the current AF fine tuning setting for each lens when you mount it, Reikan can probably pull the information from the camera and produce a table for you. I would put in a request to see if Rich will add it to a future release.
I understand the Software Development Kit (SDK) from Nikon leaves a lot to be desired when it comes to documentation and support. If you are a C programmer, you might want to give info extraction a shot yourself. I have not tried it since it has been over 20 years since I did any serious C programming.