My suggestion is to detach/dim/dark/nc as much as possible. If she is divorcing you then you should start living that life now. Continue to protect yourself, do not engage her. If she comes into the room you are in leave and go to another room. As far as the divorce is concerned. For a MLC'er asking for a divorce is asking for space. The more space you can give her there is a possibility that she will not carry through with the divorce. You have no control over this other than to give her space.
A divorce is only a piece of paper. There are two types of divorce, a legal one and a mental one. She can divorce you legally but she can not divorce you mentally unless you choose to let that happen. You can stand for your marriage if that is what you choose.
Think about that and ask more questions if you need to. You do have control over you. And we can help you with that.