Hope one of these three solutions I found online can help you. I have provided images and steps with detailed information to walk you through.
Solution 1
Turn on the Network or wireless icon in Settings
Step 1: Open Start menu, click
Settings icon to open the Settings app. The Windows logo + I keyboard shortcut can also be used to open Settings.
Step 2: Click
System icon. Click
Notifications & actions.
Step 3: Click
Turn system icons on or off.
Step 4: Check the status of the
Network icon, and turn it
on.
Step 5: Click the
Back arrow to go back to Notifications & actions. Click
Select which icons appear on the taskbar.
Step 6: Check if the
Network is turned off, and turn on the same if it’s off.
Solution 2
Restart Windows Explorer
This solution is ideal if the network or wireless icon is not automatically updating to show the status of the internet connection. For instance, many times, the icon shows that the status as not connected even when you are able to browse the web.
Step 1: Open the Task Manager by
right-clicking on the empty area of the taskbar and then clicking
Task Manager option.
Step 2: If you see the Task Manager with restricted view, click
More details.
Step 3: Under the Processes tab,
right-click on Windows Explorer entry, and then click
Restart button.
And if there is no Windows Explorer entry, it’s because Windows Explorer process is not running. Open up This PC or any folder to see Windows Explorer entry in Task Manager.
The network or wireless icon should now appear properly.
Solution 3
Enable Network icon in Group Policy
This method is applicable only to Windows 10 Pro and Enterprise editions. This method doesn’t work in Home edition.
Step 1: In the Start menu or taskbar search box, type
Gpedit.msc, and then press Enter key to open Local Group Policy Editor.
Step 2: Navigate to
User Configuration >
Administrative Templates >
Start Menu and Taskbar.
Step 3: On the right-side, look for the entry named
Remove the networking icon. Double-click on the same to open its properties.
Step 4: Select
Disabled, and then click
Apply button to see network or wireless icon in the system notification area of taskbar.
Sign out and sign in again to see the change. You can also restart Windows Explorer to apply the new setting.
(
https://www.intowindows.com/fix-wireless-icon-missing-from-taskbar-in-windows-10/)