Lets give the credit where its due, there is no doubt that KPK Police is by far the most professional and disciplined in Pakistan. This is not my opinion, even the worst critics of PTI admit that KPK Police has been depoliticized.
The lion share of the credit goes to Nasir Durrani, the IG of KPK Police who initiated all these reforms. PTI can also be given the credit that they have pulled back and let Durrani run the show for the Police. This is something unheard of in other parts of Pakistan where Police is non existent in Balochistan and Sindh. In Punjab, the IG has to get the approval of Shahbaz Sharif for even conducting a small raid or arresting anyone that is influential. Police in Pakistan has largely became the Private Militias of the Ruling Parties. The reason why Law and Order is so horrible in Pakistan is because the Police is not allowed to function independently and rather used as a political tool to settle scores.
Overall, i think its a little bit unfair that PTI Led Provincial Government is claiming all the credit. In my opinion, most of the credit goes to Nasir Durrani who is a very competent and professional Officer.