I can't find the scanner in the Wi-Fi(wifi) list.

Please download the latest Revo Scan on your PC: https://www.revopoint3d.com/pages/support-download

Plug the scanner into your PC via the 2-meter-long USB cable that came in the package.
Once connected to the Revo Scan PC, click on the "Settings" icon, in the Connection Mode: "Host", choose your specific "Region", click "Confirm" and wait for the scanner to reboot. Now, power on the scanner with an external power source, such as a power bank or power socket, you should see the scanner in the wifi list.