Edit; she’s gaining weight fine and having plenty of dirty/wet nappies

My formula fed 2 month old is starting not to really wake up for feeds anymore during the night. Her last feed will be about 10/11 ish at night and she will wake up again about 6-8 in the morning for a bottle.. is this fine?? Should I be waking her up for more feeds? She’s on 6oz. They say they will cry when they are hungry. She eats plenty throughout the day has roughly 4-5 6oz bottles and drinks it all.