Pregnant Transgender brother

Plz if you are gonna comment anything transphobic just don't comment. Just move on from this post. There's also a trigger warning for SA, and abuse.

I have a younger brother who is transgender and in an extremely abusive relationship. His partner will misgender him when angry. His partner would hit him. His partner went as far as flushing his hormones down the toilet and raped him on several occasions and now my brother is with children. He's 35 or 36 weeks now and said his partner doesn't want to be at the birth and asked me to be. He's birthing at a transgender friendly birthing center in a pool. I of course said yes but I wish I could offer more help than that. I've asked him to move in with me but he says he doesn't want to be a burden and he will figure it out. I fear for the safety of him and the baby. I hate that I can't do anything besides be there at a birthing center.