I wasn't using our separation as a step in reconciliation, but I had hoped that doing the 180 and separating would wake WS up. It partially did, and she's still coming along.
You mentioned needing the space to deal with what happened to you, which is a wonderful reason to have a separation. I'm guessing it has been outlined that you will return after that month, though. What I experienced and have noticed on here often is that the WS needs time to know what it's like without you and realistically fear the loss of you and the relationship to determine if they are willing to work toward reconciliation. I wish I could remember who first posted this, because it's so true: you have to risk the M to save it.
Ultimately you are saving yourself. You are recognizing that your WS is not meeting your needs in the relationship, determine ways to meet your own needs and share the needs the WS needs to meet in order for you to even consider R. Then you focus on yourself and create a barrier to allowing them to hurt you any more than they already have. That means that if discussing the A's is met with anger, defensiveness, accusations, gaslighting, TT or anything else negative, you quit discussing it with them. They don't deserve your vulnerability because they are continuing to take advantage of it.
Read about the 180 if you haven't. It's a great list of actions to follow for honoring and empowering yourself through this process. By the time my WS came to me with remorse, I knew I would be ok without her. It was my choice to stay, not pressure due to obligatory love for her, our relationship or our family. It was my choice, not pressure from her due to mistakes she used to justify her disgusting behavior. It was her choice because I didn't pressure her by dumping all my emotions on her when she was being mean and hurtful. I didn't give her ammo to hurt me and didn't pressure her to stay or leave. I left it alone and set my own boundaries.
Take the time you need. Identify your own needs. Fulfill your own needs. Let him stew in his own mistakes with fear that he has lost everything for a bit...or even in a fog that you are the source of all his problems. Either way, take care of you.