Did I miss something in the novel?

I feel like they never explained how she came back to life . I also don’t remember her ever discussing with the main dude that she had previously died and that HE had died. It’s like the author completely forgot. Or maybe there’s extras that I haven’t read...? Someone please tell me. I think it would have made him super angry to find out she died once and that they didn’t previously end up together. I would have liked to have read a scene like that...