Stressed out

Take off the day nappy, dont put it on ever again. Use light pants and underwear or just underwear while at home. Get a sticker chart, tell him that he will get any kind of toy that he wants after completing it. Start with pee and poo chart, once you're finished, he will know how to pee. Start a 2nd one just for poo, same rules, any toy he wants. My child is really stubborn, but it took him two sticker charts to learn this. He told me, that he pees and poos in the pants, because he imagines that there is a nappy still on and he forgets that he doesn't have one. So, I set reminders on the Google home hub every hour to remind him, that he has no nappy.