Wanted: spawn structures for flat worlds on mobile

So i noticed on the pc and console version you can select generate structure on flat worlds but you cant on the mobile version which sucks cause i only play mobile. I would like to be able to start a flat survival world only using items i find in the world through villagers and structures and such. If there is a way we can make this happen i would like to hear back.thanks in advance! Also having a flat netherworld to go to aswell would be awesome aswell