It sounds like you're doing everything right. It sounds like you understand that her bladder to hold urine for many hours over night will be ready when it's ready. No one will know if your daughter is being "lazy" by not getting up or if it's all truly her bladder, except her and maybe you.
I 100% agree with NOT waking a child in the middle of the night to go to the toilet. That is nonsense. If the bladder isn't ready, it isn't ready.
One thing to remember though is that diapers are meant to pull urine away from the body and to help keep a baby from feeling all wet and uncomfortable. I think you need to do away with the diapers. I think your next step is to switch to Pull Ups, at least for a while, to see if it is partly her. A Pull Up is meant for the child to feel the wetness, so they can feel that sensation and know to get up and go to the bathroom, to help with the transition.
I would try Pull Ups for at least a month and see what happens. It may not be the miracle cure but she will start feeling when she's wet more than with a diaper. Training pants are more mess and work, but costs less. If you can afford Pull Ups then go with those. If not, then try the training pants. You'll know better if she's sleeping through because she's used to the diaper wetness she's had from birth or not.
Also try offering an incentive to get one Skittle or one M&M if she wakes up dry. Do not punish if she's wet. Hopefully soon you'll see her less wet as her bladder strengthens and a dry morning here and there. Once you see her dry for at least 2 weeks straight take away the Pull Ups and try regular panties. Once she's dry for a straight month don't buy any more Pull Ups. She may have an accident once in a while after that but she'll soon be fine.
Just remember, she won't be wetting the bed in college, lol!
K. B
mom to 5 including triplets
*I wanted to add, if she's still taking naps, focus on nap time first as that's just an hour or two of time. Don't worry about night time, except do put the Pull Ups on her of course. She should start staying dry during nap before night time since it's a much shorter period of time.