I think make the effort to go to the funeral and be there for her x
if you can go to the funeral I'd go. There's nothing much you can say or do to make it better. But just be there for her, support her and remind her that it going to be okay. Call her everyday even if it's only 5 mins or it's just staying on the phone and not talking but to have that option. You guys can wacth a movie and video chat it so it's like your together. That's what is really gonna help I think is just supporting her.
Try to be there as much as you can for her. If you can go, yes. She might not want to be around babies as much for a minute💔. Just let her talk about him. Let her grieve
Definitely go to the funeral. But leave baby at home or with a family member. Make her a dinner that requires minimal effort (put in the oven, microwave, etc). If you can afford it, order a weeks groceries to the house so she has less on her plate. She may not know what she needs help with but think about the things you'd need help with if you were in her shoes and try to do those.