Hoping it all goes well! Don’t know why you think MIL is coming, but if she is, maybe she will help influence him to sign off on things and be done.
As for calling D - he has your number, he could call and talk to her any time. You haven’t stood in the way. Clearly being a parent is not a priority for him and he’s not attached the way a parent should be to a child. Keep being responsive to your daughter when she wants to contact him, but I wouldn’t push her when she’s not interested.
