My daughter hasn't used one since she was 9 months old. She stopped on her own
My son is now 3 years old and he gave up his pacifier at 2 years old. I had been giving him it only at night to sleep for a few months. I had been looking for months for a better way to start taking it away. I was really tired and stressed, because I didn't want to make him cry but I had to do it! One day, while sterilizing his pacifiers, I noticed that he had ruined it with his teeth, he had made little holes, so I had the idea of cutting it, a long cut so that he couldn't suck (of course I had others in reserve). He puts it in his mouth and feels that something is wrong and so I tell him "oh no, now you've broken it with your teeth, then we have to throw it away!" I made him throw it in the garbage directly. It was a good thing for him, he never asked me for it, he was good! It was difficult for me because with the pacifier he slept earlier than he should, but only for the first 3 days it took him longer than usual to fall asleep but then he got used to it.
I have no advice as my 2.5 year old is the same! It’s even got to the point where he goes into his room during the day to find it and has it during the day! He was only using for naps/bedtime but now it’s basically all day. I tried a couple times to take it away at night and he too woke up crying for it 😢