Boheminan, I am in a similar position to you in that I have recently reconciled with my DD after a semi-estrangement of nearly three years. I say semi-estrangement because she always sent cards for birthdays etc but, other than that, ghosted the whole family entirely for 6 months, moved without telling us her address for 18 months, and gave birth to a child whom she only told us of a couple of months ago. The child is now 16 months old. The situation is just so bizarre that I can't get my head round it, so I completely understand the feeling of disconnection.
I am not sure that I have any solutions other than to work at it and try to connect as much as possible. My DD and DGD live over 300 miles away so I tell myself that I wouldn't have seen that much of her anyway, that it's not as though she has emigrated to say Australia, and that at least I can now have the opportunity to build a relationship. And, you know, even if you don't have a close connection now, you may well do in the future, when the little child of today becomes an independent adult and chooses who is in her life.
I have written extensively about my situation and feelings on the thread 'Support for all those living with Estrangement', started by the wonderfully wise and compassionate Smileless, so you might find it helpful to pop in there, if you haven't already.
The only other thing I would say is that GN can be quite slow moving sometimes and, compared to MN, it can be at a snail's pace, so don't be discouraged if you don't receive instant replies. It is worth waiting for the responses, which will come, and are, with few exceptions, extremely helpful and supportive.