I don't think you can win this one, frankly! I think a lot of kids have an early period of being dry before they are fully, developmentally old enough to have full "bladder-to-brain" functioning. He can't go around without pants, obviously. And I'm not sure that kids well before the age of 3 are so fully trained all the time even when we parents think they are. Once the novelty of trying the potty wears off, it turns out they were just going because it was cool and not because they really got the "I gotta go" signal. My son was 4 before he really got it, and even then he was not dry at night for years. The pediatrician and the pediatric urologist told us to stop pushing him, stop the rewards, stop the charts, stop the alarms - he wasn't there yet.
You can certainly have him put his wet clothes in the washer - but no punishment, no judgment, and of course no shaming (which I am sure you would not do). Just ignore it. But that doesn't solve your problem of a wet kid and a ton of laundry and inconvenience.
The other thing I would do, honestly, is put him back in diapers or pull-ups. If he uses the potty, great, but otherwise he just goes in his pull-up. He's not ready. He's telling you that every day. Accept it. Have confidence that he will not go to kindergarten in diapers! He will grow into this, his body and brain will be in sync one day, and this will all be in the past.
The "experts" all say to stop trying to control what you cannot control: how long they sleep, when they use the potty, what foods they eat. You can offer opportunities, but they're really in charge, and every child develops differently.
Take comfort in the fact that your son is developing some awesome skills in some other areas - all kids do things in a different order from the kid next door. Don't listen to anyone who says "What, he's not trained yet?" No he's not - he can't be trained. He can only grow up. Meantime, he's probably really advanced in several other areas, whether it's gross motor skills or fine motor skills or verbal skills or creativity or building or color usage or anything else!