It's been 2 weeks since a massive life changing event. 2 weeks.
Honestly, In the first few weeks and months after childbirth, romance does go out the window. Life has changed for ever. It's take a while to learn to get used to the new norm.
In all honesty, it doesn't always come back. You see it on these boards all the time. However, once everything feels more normal, that's down to you and your partner.
While I think delta has expressed themseleves poorly, I am inclined to agree to a certain degree. But it's not just women who change after childbirth. I have had friends who have been so consumed with their baby, permenantly, it's been to the exclusion of the father. But I have also seen fathers act like they are jealous, like the baby is just an inconvienience, the baby is the mothers responsibility only, that they don't need to try anymore and so on. All that can totally kill a romance.
But for now, don't worry about it for now both of you just enjoy the baby. This newborn phase will disappear so quickly.