@aetisam I am from Pakistan and living in South Korea from 3 years I have not provided complete passport anywhere.
Even when I asked EMGS they said their form ask for Data page only but if Immigration want, then you need to provide.
As I said earlier, if your passport contains the endorsement of any country across the globe, then you should have to disclose the respective page too as per the requirement of EMGS / immigration department. Nevertheless, now they demand the other pages also so after submission of the same, you should wait till they respond. Good luck.