i have a gameobject that have a group of plane meshes that created randomly as child every one of this planes have a "2f" offset in x axis between every plane

what i wanna do is i wanna make the parent object arrangement the child objects on rows and columns even if one of this child deleted during the game or added so if i have 8 planes mesh it should look like that 2 rows and 4 columns like that but i don't know how to do that ?

i know how to get child objects and making offset but i do't know how to get the format like that in the image

i wanna to arrangement the planes meshes that i can acces from this for loop

 void Update(){
          Transform[] children = new Transform[transform.childCount];
 
                 //Debug.Log(transform.childCount);
                     for (int i=0; i<transform.childCount; i++) {
                         children[i]=transform.GetChild(i);
 
                             
                     }
      }