Lots of vehicles in game have weaponry, shells, ordinance and other systems that were not necessarily "used" but either proposed, intended or directly linked by clear source material. Ho-229 for example in game has its Jumo 004D engines that were proposed, Flak Rak Rad has the VT-1 missile that was a developmental proposal as well as countless tanks in game that have shells they did not necessarily fire but were either capable off, linked too or proposed with. T-72 TURMS is capable of firing 3BM42 for example and there is also background sources that confirm its use. Lynx Ah-1 never actually operationally used all of the weaponry it has available in game. But it was proposed and proven by Westland on G-LYNX that it could.
The point being, if there is credible evidence to show it was possible, was done or was intended to be done, then its something the devs can consider. But at the very least, it has to be grounded in proper source material.
These are export models and in service with other nations. Not the Soviet Union, which is who's PFM we have added now. A Polish, German, Romanian, Bulgarian PFM is not the Soviet PFM.
You misunderstand entirely. He asked why the T.52 variant of Harrier could not be added, and thats because there currently is not enough information on it to add it.
Harrier GR.1 having SRAAMs is backed up by more than enough primary and secondary sources to make it more than viable. The two cases are separate.
You asked why we did not add Harrier T.52, a separate variant entirely.
Not why we added GR.1 with SRAAM, which there is more than enough information to support.
Confusing the two cases, then claiming "double standards" is bending my words.