Changing the creation order of objects in Unity?

Question

Programming

The problem is this: let's say we have 2 objects, one of them has such a script attached to it

public class GameController : MonoBehaviour
{
    public static GameController Instance;

    public Transform SomeTrasform; // Задается в Editor'e

    private void Start()
    {
        Instance = this;
    }
}

To the second such

public class SomeClass : MonoBehaviour
{
    private void Start()
    {
        Transform someTransform = GameController.Instance.SomeTransform;
    }
}

The problem is that the second object may be created before the first one, and I get a NullReferenceException when trying to call GameController.Instance. How can this be bypassed? I have 2 options so far:
With the help of a coroutine, postpone the creation of the second object for half a second, for example. I think it's an option.
Abandon static GameController.Instance, and use FindGameObjectWithTag("GameController").GetComponent().SomeTransform; Here, too, there are drawbacks, for example, changes in the code are required when transferring the GameController script to another object, and it simply does not turn out so beautifully.

Answer 1

If you need to manage the sequence of starts, then it's time to change the architecture. Your GameController must either instantiate objects with SomeClass, or initialize them, or whatever. Read about singletons at the link below.
www.gameprogrammingpatterns.com/singleton.html

Answer 2

1. You can use Awake() instead of Start() for the first object

private void Awake()
 {
        Instance = this;
}

2. Transfer all necessary calculations in the second object from Start() to Update() like this:

public class SomeClass : MonoBehaviour
{
    private bool _inited = false;
    private void MyStart()
    {
        Transform someTransform = GameController.Instance.SomeTransform;
    }

    private void Update()
    {
        if (!_inited)
        {
            MyStart();
            _inited = true;
        }
    }
}