GridManager.cs

public class GridManager : MonoBehaviour
{
    public int radiusInRingAmount = 5;
    public GameObject tilePrefab;
    public static List<Vector3> cubeCoordinates = new List<Vector3>();

    void Awake()
    {
        GenerateGrid();
    }

    public void GenerateGrid()
    {
        for(int c = -radiusInRingAmount; c <= radiusInRingAmount; c++)
        {
            int negativeRows = Mathf.Max(-radiusInRingAmount, -c - radiusInRingAmount);
            int positiveRows = Mathf.Min(radiusInRingAmount, -c + radiusInRingAmount);
            for(int r = negativeRows; r <= positiveRows; r++)
            {
                cubeCoordinates.Add(new Vector3(c, r, -c - r));
                PlaceNewTile(cubeCoordinates[cubeCoordinates.Count - 1]);
            }
        }
    }

    public void PlaceNewTile(Vector3 position)
    {
        GameObject newTile = Instantiate(tilePrefab, position, Quaternion.identity,transform);
        newTile.name = "tile: "+position;
    }
    
    public Vector2 CubeToAxial(Vector3 cubeCoords){
        return new Vector2(cubeCoords.x,cubeCoords.y);
    }
    
    public Vector3 AxialToCube(Vector2 axialCoords){
        return new Vector3(axialCoords.x,axialCoords.y,-axialCoords.x-axialCoords.y);
    }
    
    //Return direction vectors for each side. From left to right: 0 right, 1 right-up, 2 left-up, 3 left, 4 left-down, 5 right-down.
    //Directiosn could be enumerated for clarification.
    public Vector3[] GetDirections()
    {
        return new Vector3[] { new Vector3(1,-1,0), new Vector3(1,0,-1), new Vector3(0,1,-1), new Vector3(-1, 1, 0), new Vector3(-1, 0, +1), new Vector3(0, -1, +1)};
    }
}