How to make dungeon aka structure with many rooms spawn? (without jigsaw and coding pls)

I did a dungeon aka structure with rooms. I did procedure like here: https://www.youtube.com/watch?v=2sfqLgUR2Tw&t=1s

But I don't know how to spawn it in a world naturally without my will. I tried to do that through spawning structure (on pic) with "spawner" of that dungeon (like in video). But the dungeon didn't spawned even with 999k per 1 mill. After that failure I found out that in versions older than 1.13 that kind of spawning structures doesn't work due smth with chanks. I also tried with tick rate but that also didn't worked.

I also tried to see other tutorials but they are or too hard or too long or just not what I need.

So, how to spawn dungeon in world? Somehow that to not change a lot in a procedure because my procedure is 3-4 times bigger than in video and Im lazy af.

(btw manualy placing "spawner" block works perfectly like on a pic lower)

Mcreator 2022.3. mc version 1.19.2