No, because they aren’t any better than 70’s aircraft and the additional logistics and training required to integrate them would offset any “scrap” value.
The mirages we know inside out - when they land any PAF mirage pilot can strap in and take them to war tomorrow. A Pakistani Mirage technician can change the engine or radar set on it - and an engineer can easily add a hypersonic cruise missile onto it knowing exactly where to run the wiring from and where to draw power and how much from.
Most Parts for the mirages can be taken from a EL to a Blue Flash to a Horus and bought in bulk for discount.
This was true in 1980 for blue flash 6, EL or DD or any of those we bought in the years before this. All the while this commonality reduces costs across the both horizontal and vertical PAF operations; while reducing ancillary losses due to commissions,corruption and mismanagement of funds.
They cannot do that with a JH-7 if they were bought in the 90’s and then parts, training, maintenance will require all new processes that will add to the PAF’s costs.
Ask our neighbor what happens to their budget when it gets cut around 10 different aircraft types with their added commissions and mismanagement.