using Graphs how do I find and assign the direct neighbors of a MineSweeper cell

my logic so far was 1- prefab my Node script by attaching it to a cube so that it's visible and clickable 2- using nested for loops generate x*y grid of Nodes and store them linearly in a transform called grid 3- using for loop iterate through each Node within grid and for each node check if it has top, bottom, left and right and do the following

             if (top)
             {
                 script.setNeighbor(grid.GetChild(i + ySize).gameObject);
 
                 if (left)
                 {
                     script.setNeighbor(grid.GetChild(i + ySize - 1).gameObject);
                 }
                 if (right)
                 {
                     script.setNeighbor(grid.GetChild(i + ySize + 1).gameObject);
                 }
             }
 
             if (right)
             {
                 script.setNeighbor(grid.GetChild(i + 1).gameObject);
             }
             if (left)
             {
                 script.setNeighbor(grid.GetChild(i - 1).gameObject);
             }
             if (bottom)
             {
                 script.setNeighbor(grid.GetChild(i - ySize).gameObject);
                 if (left)
                 {
                     script.setNeighbor(grid.GetChild(i - ySize + 1).gameObject);
                 }
                 if (right)
                 {
                     script.setNeighbor(grid.GetChild(i - ySize - 1).gameObject);
                 }
             }
         }
 
        
 
 

for some reason this feels inefficient and perhaps can be done in a better way, the reason why I set the neighbors of a Node to a list of GameObject because cells do need to know more that how many of it's neighboring cells have bombs for example in case non of a cells neighbor had bombs then I need to run a Breadthfirst Search and click on all of it's neighbors that are empty.