I just googeld it and found this. Anybody knows if it was materialized or canceled or the aircrafts are waiting to be delivered?
It dates back to 2016.
https://dsca.mil/major-arms-sales/government-pakistan-f-16-block-52-aircraft
Something is definitely going on. A number of senior members are giving hints. The silence of @aromerix indicates that he doesn't want to share anything more on the subject.