Is he doing it for attention?
@India no idea tbh i was told he is being lazy but that doesn't sound like him
@Abi are you able to pinpoint when he’s having the accidents? When we had our second our toddler was 3.5 and started intentionally having accidents. He only did it when he wasn’t getting attention from us It doesn’t have to be baby related but sometimes it could even just be changes that are affecting him
My son is 4 and he doesn’t have accidents at all. He is fully potty trained, even overnights- no accidents
He might need to go to the doctor and they can refer you to the right person