Distant father-to-be during pregnancy

So I’m 39 ( father 44) and about to be a single mom…. To me this is insane, I’m embarrassed that I’m in this situation. My ex and I planned to have a child. The last month or two he became distant and mean. To me just tell me you don’t want to be with me you don’t have to mistreat me. When I found out I was pregnant I told him… his response was he can’t have kids( he has a son). Then he blocked me. I, surprisingly don’t feel any negative feelings towards him, I’m not angry, I’m not sad, I honestly don’t feel anything for the most part outside of embarrassment. It sucks that I’m dealing with this alone( again) but I’m beyond blessed that God seen me fit to be this child’s mother. If I don’t think this way I think I’d lose my mind.

I truly expected the father of my child to be more connected to our baby. Here she is 5 weeks old and it seems as though he’s withdrawn and distant. We live together and he works.. but when he’s home from work it seems like his head is somewhere else. Meanwhile I’m creating this major bond with my baby. And I just feel so bad for her because she deserves both parents to be emotionally available. Does anybody else have this struggle where their significant other isn’t really putting In much effort to bond with the baby? I really expected him to be an amazing dad.