applesauce
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Yes it has more than one type of 2nd gen AESA since J-16's AESA and J-10C's are both part of 2nd gen and also let's include the J-11D's which is now being used for J-11B upgrades.
But even out of these three, only the J-10C's fit the J-10 and is specifically designed for it. When you say China has more than one 2nd gen for just J-10 fighter platform, I do not know what you mean. They have some slight differences in between them maybe for example the first J-10C from around 2017 with radar surely completed and tested on even J-10B models well before 2017. That particular radar might be slightly different to J-10C produced in 2021 but they should be considered the same platform. So any J-10C Pakistan buys will have a J-10C radar that has been developed already of course with changes due to operations between difference airforces.
Developing a new AESA is extremely difficult and expensive. Producing a new one may not be so difficult but comes at cost of manufacturing capacity shared between more product lines or cost of setting totally new production chain. For this reason I doubt a new AESA will be developed or produced for Pakistan. It will be some form of J-10C's current radar from 2021 just with the slight differences that are just necessary for PAF.
there were multiple AESA radars proposed for the j-10C, only one won out and is installed of course, but there were other prototypes made.