It is true US permission is needed for exporting KF21, but you can try first
Chinese until now is not ready to sell their Stealth to other country, while SK is already offering their jet as we speak ( even one European country is interested and also I believe Philippine and Malaysia)
If India is serious in building their AMCA and Tejas Mark 2, better dont buy anything that can make India respond back with another acquisition like more Rafale.
But I do hope better lasting peace between Pakistan and India can happen, so Pakistan can concentrate on the economy, while India will only face China