Why sprite doesn't change without coroutine?

Hello.

I've got a game object "position". Under some conditions a child of this game object (a car) is destroyed. Then the next Car object is instantiated as a child of the "position". If the position is selected, I want the sprite of the car to be changed.

But if I just try something like:

   if(selected)
   {
          position.transform.GetComponentInChildren<SpriteRenderer>().sprite = newSprite;
   }

it doesn't work.

So I tried to do it this way:

    if(selected)
    {
          StartCoroutine(Temp());
    }
 
     IEnumerator Temp()
     {
             
          yield return new WaitForSeconds(0.000000000001f);
          position.transform.GetComponentInChildren<SpriteRenderer>().sprite = newSprite;
             
     }

and now it does.

But I realize it's badly done. Can somebody help please?