I do not know any online malls accepting bitcoin in Nigeria, are there malls that are very known like Jumia or Konga or where people meet like Jiji that people can buy things in bitcoin directly instead of paying naira?
Nigeria no really get online mall bro, I don't know about any body else but I myself haven't seen anyone, the jumia and Konga you mentioned, I don't see them as online mall, but rather a third party platform for wholesalers/retailers across the country to reach customers in and outside their states, this is the reason why this two platforms may never accept bitcoin payment because the owners of the site don't own the businesses, they only owns site and can't make rules or force those selling the site to take bitcoin payment..
But talking about other business, I've see a couple of physical businesses that accepts bitcoin payment, even some car dealers here in my area accept full bitcoin payment and some other selected crypto currencies as well, but I have no idea of any online mall here in Nigeria; before we begin to talk about whether or not they accept bitcoin payment.