(TMI) Loss of sensation during sex and breastfeeding?

I am 6 months postpartum and when I have sex it's like penetration does not feel nearly as good probably about 1/3 of what it use to feel like. We do use lube.

Some times it feels like just a "in and out" feeling without any pleasure with it.

Is this linked to hormones from breastfeeding? My sex drive isn't low (other than because sex kind of sucks)

Or is this vaginal trauma from child birth?

Any experience? Thank!