Question about placing a Structure within an Entity.

Hello!

Im using Mcreator 2024.2 and my problem is that i would like to spawn a structure when an entity spawns, the issue is that i cannot find a procedure to spawn a structure, i was in some youtube tutorials that they have used that but i cant just find it, its like "place at x: y: z: with rotation: mirror: structure:". Thank you for reading and if there is a solution, im all ears!