I think the purpose of splitting that particular feed for small babies (if possible) is out of consideration for the mum. Having said that, since I BF before the bath, I never had that issue. Baby fed until there wasn’t that much milk left. I gave a bottle of expressed breast milk (expressed in the morning) after the bath.
If you aim to put the baby to bed around 6.30-7, the baby will sleep better after a bath and a bottle. If the baby has a huge bottle before the bath, a small baby may end up “milk drunk” and fall asleep before the bath.
If it is possible to feed the baby a feed, before the bath, then bath the baby and then top up the feed, baby will fall asleep easier at 6.30/7pm. As a mum, I then had something to eat and went to bed around 8/9.
DH feeds baby from a bottle around 10pm/11pm or earlier if the baby wakes up. This gives the mum a few hours of undisturbed sleep before midnight which makes it easier to deal with night waking. For me it was a life saver.
It also gives the dad some time alone with the baby. If the baby doesn’t wake up at 10/11, the dad wakes the baby up for a feed.
If you exclusively BF your baby up to 6months (as I did), Gina Ford also recommends expressing milk at certain times. This helps increase milk supply and gives you a stash of milk which can be used for bottle feeding. It is useful to be able to give a BF baby a bottle.
I don’t know anything about formula feeding a small baby (we topped up BF on occasion), but are there any concerns about over feeding? Again, please forgive me if that not is the case, I never looked into it.