Hi Lyssie, is she waking because of the dummy? I guess is she waking because it falls out? For night feeding if you've weaned it all together and she's sleeping through GREAT. But I would say if you do a DF at 10:30 and she wakes around 2:30/3 maybe feed her and then she should be good till she wakes and you'll know that 4am isn't due to food? That being said if she's used to Sleeping through with out a feed and you can settle at 4 go for it. I know with mine he never got a DF. So he was doing BT bottle, then one around 1 and another around 4:30/5. Then the one dissapeared around 7 months. But the other stayed at 4am until about 9 months then I weaned it when he stopped taking his morning bottle due to being full. Just my experience. I know some moms who will try to settle and if they do great, but if they wake up again with in 30-45min it's probably due to hunger. There is nothing wrong with trying to resettle first.
As for rocking, I'm so bad at that. It was my go to at that age when I couldn't settle my ds back down again and it worked but it was defeintely a prop on purpose. That's great she's an Independant sleeper GREAT JOB!!! Resettling short naps is so difficult and at some point I remember just giving up and saying enough. I'd give it maybe 15min of trying and then would get him up.
Long winded sorry. I guess that 4am could be developmental as well if she wasn't hungery. 4-5am is my sons witching hour. If he's uncomfortable going through a GS, SA or any other number of things and he wakes it's almost impossible to get him back to sleep.
HTH