I think it's pretty clear he's not going to do that.
I think when he said he would raise her with OP, OP heard what she wanted to hear, as the child's actual father is completely absent, she attached immediately to the vision that her new partner is now dad, and will provide everything, no matter the circumstance, end of. "Instant dad."
I think DH meant it, as he would raise the child day to day, provide housing, care, food, social activities, clothes, all the basics. Everything the child needs to a nice level. He didn't mean hundreds of thousands of private school fees and inheritance from him/his family.
He's already providing all the necessities that her father doesn't. And OP just takes this as minimum entitlement, berating him for not doing more. She's decided "you're dad now" because it suits her not to have to make any effort with the actual paternal family, it's easier for her to pretend the paternal family don't exist because they show no effort and bring nothing to the table. But it's not right. She chose to procreate with the father, but she's got a "better" option now though, so fine by her to call this DDs new dad. She cut ties with the actual grandmother who "cries too much". But throws tantrums about a 96yr old step-great-grandmother (that's not even a thing! step-great-grandmother ffs) for wanting one picture at her grandsons wedding, with her blood grandchildren.
I wonder how much of DH's expected involvement was actually volunteered by DH, or if the dynamic was more OP telling him how wonderful it will be now he's doing everything for her child, and him just nodding along because it's what she wanted to hear, and gave him an easy life. Now it's crunch time, she's finding out that he was indeed just nodding along.
Her focus should be repairing a relationship with the real paternal family, not berating an unrelated family because they fit the model of what she wants better, but aren't acting how she wants them too.