4 year old boy peeing the bed.

He’s actually 3 gonna be 4 the first week in November. I think it’s normal he pees the bed at night he’s fully potty trained (pee and poop) other wise. He just needs a pull up at bed time. His dad thinks it’s a small issue to still be peeing the bed. But he does sleep at least 10 hours sometimes more. He had gotten up a few times in the middle of the night to pee. But there are some nights he still pees the bed. Any tips ? I’m totally fine with him still wearing pampers at night. But would love to transition him out soon.