Breastfeeding and milk production

I am trying to sort through the information on breastfeeding and keeping up milk production. I am a soon to be first time mum and while I would like to breastfeed, I was planning on pumping as well so I can get some sleep at night and also so my partner can be involved in the feeding process which I think is very important. I have been hearing that sleeping through some night feedings leads to a decrease in milk production even if you pump extra milk earlier. I am wondering how much of this is actually data informed information and how much of it is just bias playing into the whole “women should breastfeed on demand all the time and that’s always what is best for the baby and mum”.