My little boy (3.5) was showing all signs of readiness at 2.5 and reliably went to the potty and was dry in the day, minus a few accidents for several months.
For the last few months though, I can see he’s wet himself (a small amount, so he must be holding the rest in) when he’s playing or when he comes to sit on my knee. I’ve tried his favourite dinosaur underwear for when he does his wees on the potty or loo.
I do gently remind him, but he’ll only go when he’s absolutely desperate and already let half of it out. We’re changing trousers 5-6+ times a day. He knows he can get more trousers so he just doesn’t seem bothered tbh.