Read somewhere that the plane was in storage for 2 months. Every airline including PIA is bleeding money due to COVID. So the could've launched the plane without carrying out the full maintenance required post-storage.إِنَّا لِلَّٰهِ وَإِنَّا إِلَيْهِ رَاجِعُونَ,
Yes, this seems to be alarming that both engines failed at the same time. It will be a major point to look in the investigations.