Not many images of the installed IFR are available so far... and not a single one during flight/ aerial refueling.
The block-2 is undergoing tests for different parameters.
Block 2 JF-17 makes first flight ahead of Block 3 improvements - IHS Jane's 360
Following is one clear image , that was posted before as well.
The images was taken at PAC Kamra.
IFR can be easily installed upon mission requirement at airbase in short notice. China J-10A can easily have this mod too and most w/o the IFR. I am sure its the same for JF-17 blk 2