And why not? Chinese, Russians, US have/utilize several types of 1000++km subsonic cruise missiles for anti ship, land attack.
Dude, you serious?
Every nation makes weapons according to its own needs/doctrine/threat-perceptions..
You know Pakistan's threat-perception. Our military-machine is geared up to take on india...not Israel, not Europe, not Iran, not Srilanka...BUT india!
So all our weapons would be india-centric.
China/Russia/America need long-range cruise missiles because of their own size and the size of their perceived enemies.
For us, range is secondary once we have achieved required range to target india.
Hence you also haven't seen ballistic missiles from Pak with increased range. Not because we can't make them, but because we ALREADY have what we want...and now we are diverting our resources towards other weapon systems..that too..india specific (Point in case: Nasr battle-field quasi-ballistic tactical weapon system)....
You might see increased range of Pakistan's weapons/cruise missiles...but rest assured, it won't be before we develop all of the technologies we want. (Anti BMD systems for our missiles, pinpoint accuracy, completion of JF-17's upgradation, Al Khalid-II tanks, perfection of TERCOM/DMAC, and so on)...
And please tell me why you havent even serviced it in your navy, at the very least after how long?
There is a difference in "not even servicing in our navy" and "not announcing it publicly"
Also, development of cruise-missiles---and perfection of most advance technologies like TERCOM/DMAC...takes years.
Your nirbhay isn't reaching of today's level of Babur atleast for next six years.