I believe it's eaten mainly in Kashmir. There is this Pakistani bakery/cafe near where I live, which is owned by a Kashmiri gentleman and serves mainly Kashmiri foods, and I've noted that they have a few varieties of lavash. I asked the gentleman how common it was as I wasn't aware Lavash was eaten in Pakistan. He said it was commonly eaten for breakfast folded up with nuts in between.
I think lavash is originally Arab, I believe Lebanese eat it too. Similar to chapatis/rotis.
Nakki di Roti (unleavened corn bread). Always served with fresh sarson da saag (mustrad greens) and home made butter. A quintessential Punjabi dish. Definitely a much cherished winter specialty.
Khandaari Naan. Long triangle naans, I remember eating them in Khyber Pakhtoonkha. But I don’t know if they’re native to KPK.
I’ve seen Afghan women smacking huge rotis in clay oven in KPK when we passed Afghan refugee camp in Peshawar. It was fascinated by the size of rotis. I would take me a full to finish up that roti, even if I eat three times a day, lol.