rain briar
The Wii needs a 2.4ghz signal with Network 802.11b enabled, and the security type set to at best WPA2-PSK (AES). If your isp will not let you change these settings, you have a few options:
You can use a LAN adapter. It must have the ASIX AX88772 Chipset or say “compatible with Wii”. Here’s a recommended LAN adapter by uGreen https://www.amazon.com/dp/B08DRKYKMM/
Alternatively, you can buy router and just use the isp you already have, like a mesh network. Here’s a cheap router that should work for the Wii https://www.walmart.com/ip/Netis-WF2412-Wireless-router-4-port-switch-802-11b-g-n-2-4-GHz/37406393
hot badger