Pakistan mediator. Why is he suppressing a fire in the mediate East?

The Pakistani mediation, which was sponsored by the Prime Minister of this country, Shehbaz Sharif and the head of the Pakistani army marshal Asim Munir, at least for a minute contributed to reducing tension in the mediate East and the Gulf region. How did a country that was isolated in political games respective months ago play a key function in the ceasefire between the United States, Israel and Iran?