What do you do when the ex you'd like to get back together with breaks no contact?

does it matter when she does it? I'm currently working on myself but of course I'm just curious what to do in this situation so I'm prepared.

No clue how to go about this. I will not be contacting her first no matter what, no matter how badly I want too. I read the "how to get your ex back" thread by Cody but I'm not quite sure how to deal with her reaching out to you since it says to reinitiate contact yourself?