She is a child.
Children have accidents.
It is childhood.
None of us, when we were kids ourselves, were perfectly dry every day all day or night for 24 hours straight.
Per all of my daughter's Teachers, from Preschool to Kindergarten to 1st grade, ALL said that kids these ages have, accidents. It is normal. But the parents won't admit it because they are ashamed of it or embarrassed. But these are just young kids. They are not perfect experts about their bodily control.
Giving rewards or punishments, is not going to biologically mature her body any quicker. Or faster.
It is about physiology. And about the bladder/brain/myelin sheath and hormone development as well.
And night time dryness, is a whole DIFFERENT timeline. And is not the same as daytime pottying.