Your daughter IS already weaning. She doesn't nurse much right now.
My daughter was the same way, and I let her self-wean...and she did at about 2.5 years old. On her own. And yes, like your boys, my son "weaned" quicker and earlier than my daughter, and my son also used a pacifier and could self-soothe better, versus my daughter.
Just nurse her IF she asks perhaps... that is still "child led" weaning. That is what I did, versus just nursing out of "habit" or routine. My daughter also did not use a pacifier or lovey...although I tried. She was just not into the self-soothing with anything except with using "me." But, once she did wean, it was fine, and she could in fact sleep on her own. Albeit it took patience after nursing her for all that time. But I do not regret any of it. I just believed in self-weaning.
Just wait and see... like I said, your daughter is weaning in fact. For me, I was also soooo ready to wean...but I let my daughter self-wean. And looking back, even my Hubby was proud of the extended breastfeeding I did for our kids.
Your girl will stop. For my daughter it just popped up one day and she "announced" that she did not need to breastfeed anymore and she was a "big girl", and in fact she thought it was "silly" she was doing it. So there came a "natural" inclination within her....that her little voice inside her was letting her know that she was all done and perfectly fine and didn't need to anymore.
Each child is indeed different. It will end, and it will be a milestone and a bittersweet fond memory for Mommy.
All the best,
Susan