I domt know if I missed a chapter or something but what happened to sophie??

You didn't miss anything, (they said) people are still searching for her but this part of the intrigue is put in second plan for a while and will surely pop back in a few chapters. Caus they have to build up the amnisa and let the cousin be an imposter and create problems in her position for dthe plot and the drama to continue and Iris to grow biger and overcome new difficulties. (Sorry for any mistakes but English isn't my mother language) (=・ω・=)