Night feeding

My LO last feeding is around 7plus or 8plus everyday. Then she will fall asleep. I will always dreamfeed her around 12 or 1am and it will take about an hour for her to finish the whole bottle. She is asleep and it is very tiring to feed her. Can I check if anyone of you face the same situation and what am i supposed to do? Let her sleep and wake up on her own? Don't have to dreamfeed her? I am worried if she is not getting enough fluid. She is drinking 120ml every 3 or 3.5 hours