I can’t understand why anyone would want an apology from someone who had wronged them terribly (as in the case of abuse). An apology requires opening communication with the person again, and some people it’s really safer to stay out of touch with, even if you have managed to let go of your anger at them.
But then, I never liked getting apologies, even for minor wrongs. Even as a kid, it made me feel awkward and uncomfortable, especially when the other kid wasn’t really sorry and was being forced to apologize. (I didn’t like apologies anyway, but hearing a fake forced apology made me want to run away and hide… partly because I knew it was making the other kid even madder at me, and more likely to attack me again as soon as the teachers weren’t around. Don’t force kids to apologize– it can lead only to violence, misery and death.)