Why is this a taboo question? Moms are on here asking for advice on nightweaning all the time. In your case, it's just nightweaning from a bottle rather than the breast. It isn't as though you had much choice about introducing the bottle, after all, and now is probably a good time to take it away.
As for advice, I can't offer much as my own nightweaning journey has been up and down for over 6 months now, for a number of reasons. But there are a few things we've learned in that time. It sounds to me like your LO is waking up at night because she's still hungry. (If it was just sucking for comfort that she needed, she'd be OK with comfort-nursing, presumably.) Have you tried giving her a fat-and-protein-rich snack right before bed? Toast with some kind of nut butter, or eggs, or something? That might be enough to keep her from waking hungry. When we can convince my DD to eat right before bed, she frequently sleeps better and does not wake to nurse in the middle off the night. (It's getting the kid to eat that poses the more difficult problem...)
You could also try putting water in the bottle instead of milk. Don't know if she'd go for it or not, but it might be enough that she has the bottle in her hands, and would go back to sleep. Then she'd adjust her caloric needs to daytime on her own, and eventually stop waking at night at all. (That's the theory, anyway.) Switching to water wouldn't completely eliminate the bottle, but it would at least minimize the dental issues associated with toddlers having bottles at night. Especially if you're giving her sweetened milk substitutes like rice or coconut milk.