Hi, I am an Independent Advisor, and welcome to Microsoft Q&A.
I understand you are having problems with your WIFI.
When was the last time it worked fine?
Please restart or reboot your computer and check if the icon is back.
In the next step, open Start Menu, type in Control Panel then open, go to Network and Internet, then Network and Sharing Center, on the left side, click on Change adapter settings, then on the right side look for your WIFI device, right-click then choose Enable, if it does not work, right-click it again then Diagnose.
If that doesn't work, we need to remove the WIFI driver from the Device Manager and restart the pc to reinstall it.
Here are the steps to completely remove a Device from your computer.
Step 1. Use shortcut keys Windows key+ + X
Step 2. Select Device Manager.
Step 3. Expand the entry for Network Adapters, Right-click the problematic device, which is either an Intel Wireless or Realtek WIFI adapter, and select Uninstall device.
Step 4. You need to check the option Delete the driver software for this device and then click the Uninstall button.
Step 5. Reboot the computer.
After the reboot, please see if the problem is fixed.