Even if they are not sending data, there will be periodic communication between the access point and the device. Wifi power saving modes are pretty advanced and

Even if they are not sending data, there will be periodic communication between the access point and the device. Wifi power saving modes are pretty advanced and described here: https://howiwifi.com/2020/06/25/power-save-methods/ https://howiwifi.com/2020/06/25/power-save-methods/.