My daughter will be 5yo next month. She wears pull up every night and definitely makes it wet for sure! Does your boy / girl drink milk at night? I am struggling when to stop her milk, perhaps that is the first step of toilet training.
if your kid go to sleep at 9pm, then call them up 11pm ( especially the dinner take congee) ... then go to bed until next day . It continous for 2 wks.