Night time dryness is hormonal. You can’t train it. The kidneys release a hormone to stop producing as much urine during the night sometime before 10-12 years old typically. You can help my reducing water intake before bed and having them use the bathroom right before tucking in, but it’s not learnable

It's perfectly normal for kids to wet the bed until age 8.
You can't really "train" for night time. It all depends on when their bladder matures which happens at different ages for each kid.
My daughter bed wet until she was 5. She had her first accident a month ago for the first time in a year and she's now 8.

I'm struggling getting my 4 year old to poop in the potty as well....🤦🏼‍♀️. So you're not alone. I try sitting her on the potty 30 minutes after she eats (what her pediatrician suggested) but she'll hold it...

Limit drinks before bedtime and to stop the overnight bedwetting you may have to wake him to use the potty and go back to sleep. Children sleep so deeply and their brain doesn't always wake them up when they have to go. I kept my daughter in pull ups at night until she stopped wetting them because she is the kid that stays awake if she wakes up. I couldn't wake her to use the bathroom and get her back to sleep. It's a process and you're doing really well.