Daughter has become distant since new baby

for 22 months you and her were in the post-partum fusion where a child sees nothing but his or her mom, now a new child arrives and is experiencing this fusion, a lot of big changes and big emotions in everyone involved. its healthy for her to bond with her dad because bonding with other people beside their mom is an important part of emotional growth, so is developing some independance from the mom , in the sense that the fusion time is over. now the real relationships develop and you also will develop a new bond with her, that of a parent and a child, which is different than the temporary baby-to-mom dependency relation. basically the previous bond is over and will not come back, but that's a good, healthy thing, a new bond will develop and this one will last until late adolescence, then an other mutation will pass which will last until you die. you're just watering a tree to make sure it grows well but it will more and more become its own thing.