That’s probably about how much I lost taking care of ours. She generally woke up twice to drink milk but I was still up for the first one. Loss of an hour sleep can still be brutal if its like 6.5 to 5.5 hours.
Possibly sleeping longer to make up for it? In the early days you might lose up to an hour per night feed but if you go to bed a little earlier and have a sleep in then you should hopefully be able to mitigate that two hour decrease.