@MiG-35-BD PAF will induct these prototypes of JF-17B, but these are mainly for export. Countries like Myanmar,
Senegal and Nigeria need these for training purpose. This year PAC will produce 12 additional JF-17A Block IIs in supplement production so PAF will have 62 Block IIAs, Block III's final contract is about to be signed in a few weeks.
What I know about Block III, mentioned is the Thales Scorpion HMD, AESA Radar either from NRIET or J-10C's Wushi AESA. Block IIIB will be similar to this B prototype while Block IIIA will have redesigning. And good news is that the powerplant is not RD-93 (Not sure which one but will let you know soon).