I remember when I registered for AliExpress they automatically opened my AliPay account but never asked for any identity verification. Since then I have been using my debit card (MCB lite) for all payments (even I received refund once) and never have I been asked for any ID verification.
I think AliExpress has tightened its screws for Pakistani users since Pakistanis were notoriously involved in asking for refunds despite of getting the product or they were using bad shipment method (ordinary small packet plus or 4px OM Pro) and were demanding refund due to undelivered packages which is entirely their fault since they did not bother to pay for better shipment method.
By the way you don't need AliPay account for shopping on AliExpress.