My wifi is not visible in the list.

If your router is currently set to transmit only on 5 GHz band, it's possible that your laptop's Wifi card is only 2.4 GHz. You would be able to see 2.4 GHz networks near you, but not your own router unless it also transmitted a 2.4 GHz network.

Another possibility is that your router is set not to transmit the network name, so you would not see it. Network name and network bands can be set in the router's administration screens, which you could access via Ethernet cable or via another device that does connect to the router's Wifi network.

On your laptop, open a CMD window and type (or copy and paste) the following command, and then press Enter:
netsh wlan show drivers

Look for a line that begins "Radio types supported". For example, on my computer that line shows as:

Radio types supported : 802.11b 802.11g 802.11n 802.11a 802.11ac 802.11ax

Copy that line and paste the results here. It will tell us if your Wifi card supports 5 GHz band or just 2.4 GHz. 

Another way to tell is to find the brand and model name/number of your Wifi card (there are various ways, such as from Device Manager), then search for it on the Internet. You will be able to find if it supports 5 GHz band or just 2.4 GHz. 

If it's only 2.4 GHz, you can easily replace your Wifi card or add an external USB wireless device.

The radio types supported shows : 802.11b/g/n/a/ac, so I guess 5ghz is supported.

When you cannot find the wireless icon, reboot the computer. When it still does not show, download and install the latest drivers.