The idea was inspired by thegartmans522, thank you.
https://www.curseforge.com/minecraft/mc-mods/builders-dimension
A Builder's Void Dimension introduces seven blank dimensions to create worlds in a completely blank world, to create projects away from other dimensions.
The mod adds seven portals made by ore blocks, lit up by a Portal igniter, a survival friendly recipe consisting of oak planks, stone, one iron and gold ingot. The portal Igniter can light up any of the added portals, no need for multiple recipes!
These portals give you the experience of being able to create many projects away from other dimensions, a completely free area away to build whatever you wish, it is also useful to build schematics away from other dimensions.

