Pakistan mentioned in its letter of request that conditions would favor Afghanistan in Chennai. Thus, the change of venue plays into Pakistan’s hands.
So I doubt very much that the ICC will heed this request. Maybe if Pakistan provides some compelling security reasons, then the match can be rescheduled. One more important point. Pakistan’s interesting request to move the venue of the match. Right now the schedule is that Pakistan plays Australia in Bangalore and Afghanistan plays in Chennai. They want the venues switched. It is only for security reasons that the ICC will consider such requests. In 2016, the T20 WC India-Pakistan match was supposed to be played in Dharamsala, but it was moved to Kolkata for security reasons, he said.