trying to generate a structure in chunk (-1,-1)

ok so not entirely true. I'm having trouble getting the exit portal to not spawn halfway in the void in my all-void end world. so, my thought is either find a way to change the noise to be pretty much all around the very centre, or make a structure generate in the terrain_generation step which the exit portal can spawn on top of. happy to provide more context, but i've been struggling on this for a while now