Generating block_collums below structures

Heya i have been working on a addition to my WallsOfConquest datapack which so far only ever replaced existing structures with custom ones. So i am pretty new to the whole adding my own generated structures deal. I got most of the stuff i need figured out to get my design running my biggest issue rn is to figure out how to get the block_collums to generate below my generated structurepieces. so far i followed the setup of Navastructures pack as far as i could but it refuses to work ingame regardless here are some pics of the setup : https://i.imgur.com/AbxRCCZ.png https://i.imgur.com/YJby43A.png