What about an apology for the 1 million Biharis killed by the Mukti Bahini in Bangladesh?
I am a Bihari, & my father & his siblings grew up in Bangladesh & did their early schooling there. Most of my Dad's side relatives were in Bangladesh as well pre-1971. I have felt the events of 1971 impact me directly. My avatar is of my uncle who was in the Pakistan Air Force in Chittagong, who was killed in April 1971 by rebels & received Sitar-e-Jurat. My Dad just about made it alive to Karachi from Dhaka in 1971, my family had to leave their houses & everything else to make it to Pakistan alive.
What happened in 1971 is done. No apologies from Pakistan. I am happy they got independence, & I am glad they are not part of Pakistan today. Germany did not apologize for the events that led to WW2, neither did the Soviet Union. And even in that case, it's different, because there were atrocities committed by both sides.
The people in West Pakistan were cut-off from the ground realities of the East, & did not know what transpired there. In a way, that makes them less to blame as well, as it was mostly the West Pakistan's government's responsibility for what transpired in 1971. But it is very easy for people like Imran Khan supporters today to be apologetic & easily move on, as they have not been traumatized by the events of 1971 like I have, my family has.