I did not have the option to export the 3D values, only surface values are available. That was the reason which caught me up in thinking that something might be wrong with the named selections maybe:
When I run a cutplane, results don’t show up in the volume inside. It is just the outline. I want the complete graph of Melt Fraction (MF) vs time as shown below. It is very easier to do that in CFD-Post as I have used that previously but I am open to using Fluent as well, not sure how to do so though.