some kids are deep sleepers. try a bedwetting alarm like therapee (on amazon)

Our pediatrician referred our 8 year old to the urology program at Childrens hospital and they (1)recommended the Malem alarm for us once they had cleared any other physical issues, (2) discussed medications that can help for things like sleepovers, and (3) had us focus a ton on daytime hydration and toileting - like to the point where she had an alarm to remind her to go, teachers expecting increased requests, and we expected her to fill her water bottle and empty it X times during the day.

Doing the above plus 4 weeks with the Malem alarm solved it. ::knocks on wood:

I would try a high quality alarm like that one for a few weeks and see if you start to see him waking up and stopping, to finish in the bathroom. That's a sign his body could be ready to finally make the connection. If you don't see that progress during that time, I'd stop and come back in a few months and try again.

This also runs in our family and we didn't want to make it a big thing until the kid was committed to solving it

If everything checks out medically thier might not be much you can do . My 8 year old son is still wearing pull-ups to bed . My nephew quit close to 12 .

Talk to your kid, if it’s new due to the divorce it should self resolve with whatever therapy he is in. Now if it’s always been like this then talk to the doctor his body maybe not be generating the hormone. https://www.kidney.org/medications-to-treat-bed-wetting