benetint there are loads of threads about this very common subject but IME , nappies/pull ups absorb and keep the wearer dry (unlike the old style terry nappies and plastic pants that cut into your legs and hold the wee in)
If you take your child for a wee at night wake them up don't let them dream wee. Make sure they do pee, not just sit on the loo, "done now" and back to bed (resulting in a peed bed)
I used to run the tap and tell them to "Listen" , but they had to be awake.
Certain drinks (cola,cocoa,blackcurrant) is worse.
We did the measuring in a plastic jug (holding the bladdder -not the early morning wee- until it was full then measure how much . Do once a week , it should increae)
20p in a jar for every dry night (worked best)
If they peed because they CBA going for a wee (and yes it did happen ) they stripped their own beds and remade them. 30 seconds of effort on their part saved 30 minutes work for me. So the only way to get them to realise was to get them to do it.
IIRC they won't refer a child until 7yo.
But have a search by subject, lots to read .