Disappearing notification icons are actually a common occurrence in Windows 10, with the internet and Wi-Fi icons being primary among them. For some reason, what should be a very simple element of Windows 10 is more problematic than it should be. If your internet or Wi-Fi icon has disappeared from the notification tray, here’s how to fix it.
Getting the icons back into the notification tray should be as simple as re-enabling them. However, first we should check that your network and/or Wi-Fi are actually working.
If they are enabled and seem to be working correctly, check the notification area itself.
In the vast majority of cases forcing Windows to turn network notifications on and off again is enough to bring the icons back to the notification area. The icons should now behave normally, for a while at least!