Potty Training for Toddlers & Kids with Countdown, Flashing Lights, Fun Music or Vibration Alerts - Waterproof Interactive Toilet Training Reminder for Boys & Girls Ages 2-9

It’s possible that he’s able to sense when he’s wet, but hasn’t quite figured out his body’s cues that tell him it’s time to go beforehand. It’s also possible that it’s a communication issue. A couple of solutions might be something like a talking potty button (https://a.co/d/0bmpb3yA) or a potty training watch (https://a.co/d/0i3urWID) that can help remind him to go.