Night time dryness... is entirely different than day time pottying.
Night time dryness... does not occur, BIOLOGICALLY, even up until 7 years old.
Just get a waterproof bed pad, to put directly under her when she sleeps. This makes clean up much easier.
I have 4 of them that I got from Amazon.
My kids are 4 and 8...and I put these right under them.... (not under the fitted sheet), and so if they have an accident, it is no big deal. By putting the waterproof bed pads directly under my kids.... if they have an accident... the sheets don't even get wet or soiled. I just change it out and put another bed pad under them. And they go back to bed. No biggie.
Pull-ups for night time is useless, because it leaks, does not hold much and is expensive. I just use a night time diaper or a regular diaper for my son at nap and sleep times. AND change him 1 time during the night, otherwise by morning, his diaper is over flowing.
My son is 4.
A child will have accidents... day or night.
It is normal.
It is childhood.
Peeing at night, is INvoluntary. It is about the biological maturity of their organs.
Getting frustrated, will not make her dry at night.
My daughter, when she was 5 years old, was still wearing a night time diaper to bed and naps.
Normal.
AND even at 7 years old, she still had a pee accident at night every so often. She is a deep sleeper.
all the best,
Susan