What makes you think she isn't interested in her feeds? DS is now taking a full feed in less than 5 mins sometimes, it might appear like she is disinterested if she has become quite a lot more efficient maybe? The 9pm feed....do you think she's just OT going to bed so waking for that reason, but then happy to take a feed? If you've been pushing A times or skipping the CN that would be quite common to get wakings at that time. Have you tried resettling without feeding?
Are her naps affected if you don't bother with the top-up feeds?
In case it helps, when DD was that age she fed at WU, after nap 1, after nap 2 and at BT so roughly 6.30am, 11am, 3/3.30pm and 6pm ish. She also had one night feed (no DF) until 7 months. DS isn't quite on 2 naps yet but headed in that direction, he tends to feed mid-way through his first A time at 7.30/8ish (not usually hungry at first WU due to night feeds) then at 10.30/11am, 2/2.30pm and then BT (6pm ish) - sometimes with a 'snack' at 5pm if feeds have fallen earlier during the day.