This is a late response. Computer down.
I don't know so much that she isn't sleeping because of the pacifer so much as she just isn't tired enough to go to sleep. I found that laying down and being quiet was all right for an hour or two, quiet time can be very restful for a child. I had one that quit napping at 2 years old for the most part. It was very rare for him to sleep for over 20 to 30 minutes if he did sleep at all after that age. He went to bed at 8, got up by 6 and that was just his schedule.
Neither of my children used a pacifer. I didn't like them and still don't for a variety of reasons sanitation being the biggest issue, but my nieces and nephews used them. My daughter had a special blanket she used, my son had a bear, my brother had a small pillow (we laughed when he was leaving for West Point that he would have to take it with him he is 9 years younger than I am), and my grandson has puppy a stuffed dog that never came into his life until he was all ready a year old. My cousin had a lion that looked just like mine (she was 3 years younger) and I remember spending the night at my grandparents. Cathy had misplaced her lion and we couldn't find it anywhere. My grandmother put a lipstick mark on the cheek of my lion and attempted to give it to her so she would go to sleep. We ended up taking her home at 2 a.m. that night and by the way, she wouldn't sleep there either. We finally found the lion in the basement in the cabinet we used to store our paper dolls in the next day. If you didn't throw it away I suggest you give it back to her, it is a comfort item for her and the Creator knows we all need something to comfort us.
Good luck,
P. R