Structure dimension with void

Hello,

In my mod, I'd like the player to complete the rest of the story in an empty dimension.
In this empty dimension, I'd like the player to spawn in a structure I've made at precise coordinates.

Is it possible to generate a structure in an empty dimension and have the player spawn in it? I'd like this structure, which will serve as a hub, to spawn only once, to avoid it being generated each time the player joins this dimension.

Thanks in advance!