This is another slide from the same presentation:
View attachment 22695
On the right is Turkish Aerospace Pakistans incorporation certificate from SECP, which has NOTHING to do with NASTP. Turkish Aerospace doesn't even have an office in NASTP. So I take their claims with a mountain of salt.
That being said, judging from the slide and discounting the usual false bravado, I think that PFX is the name given to an effort to deChinaofy the JF17. Notice the lack of the Chinese flag in a slide titled JF17 PFX. There have been conversations iniated by the PAF on this topic several times. The inclusion of the Iran flag is peculiar. I don't have an explanation for that.