M.R.
Don't worry about this one bit. Night time bladder control is a maturity issue, and that is widely variable. What do you do to stay dry at night? I mean, do you have to think about it? It happens when the body is ready, and thank goodness we live in a time where there is protection for her to wear that works, and if she needs more than a pull up, try good nights, they rarely leak. In my mothers day and age, she had to hang up her sheets every day outside to dry, and was misserable until she was 12. My daughters had the same issue, as did many, many of their friends. She will not be alone, for sure. I have heard about training methods, but it is an issue that will take care of itself...time is the answer.
M.