how to make a knot like a trigger in unity

Hi! im trying to have something like
if(knotName = “Final1”)
{
button.gameObject.SetActive(true)
}
else
{
button2.gameObject.SetActive(true)
}

idk if it’s possible that depending on the knot you are in it’s going to let me appear those buttons

i think my question is how do i call the knot to do that