How to find the child of a child element?

Question

Unity

There are a certain number of elements that are created as children of the previous one. How can I use a script to find the last child element that exists in a hierarchy?

if (curParent == null)
        {
            childOfCube = rootObjInScene.transform.Find("forPlayer(Clone)");

            if (childOfCube != null)
            {
                curParent = childOfCube;
            }
            else curParent = rootObjInScene;