Line not being called after timer on unity C#

As far as I understand, you want to make a delay in your cod line. In unity, we use IEnumerator for this. Here is an example that makes 2 seconds delay:

void Start()
{
    //Start the coroutine we define below named ExampleCoroutine.
    StartCoroutine(ExampleCoroutine());
}

IEnumerator ExampleCoroutine()
{
    //yield on a new YieldInstruction that waits for 2 seconds.
    yield return new WaitForSeconds(2);
}

you can use StartCoroutine() method where you need it in your code.