You realize it's where she is - not sure what you meant with that statement.
Guilt and remorse for her affair and for deciding to divorce, that's what she has right? So I still say that is a good thing, it means she has a conscience that she wishes to abide by. Detachment means not worrying about her wearing the ring.
I think it's more important to show her that you will be fine than to mention it. Your validation will be stronger if you just respond to her thoughts or feelings.
I get the impression that you are being hard on her, which I understand, but I think you need to consider that her asking about working on it, even though it is little things so far, should be given some consideration. I guess I am confused because it seemed like there was a few times where she was talking to you about patching things up and I don't understand why you haven't given that much of a chance. I haven't reread your sitch lately but I have been following.
H 34 W 29 BD 3/12/18 Divorce Busted Spring 19
It is not things that bother us, but the stories we tell ourselves about things.