Hi @halden2714,

If you are experiencing issues with your devices not detecting the Wi-Fi network of your TP-Link Archer Router, or only can detect 2.4G, or 5G, please follow the troubleshooting steps below:
For 6GHz network:
    1. Make sure the 6GHz network is enabled and not hidden, you may check this on the Tether APP > More > Wi-Fi Settings.
    2. Make sure your client device supports 6GHz Wi-Fi, drivers and system are all up to date.
    3. Make sure you are using the Router and the client device in a country that allows Wi-Fi 6E/7 operation, if your Router and client device are not purchased from the same country, Wi-Fi 6E operation might not be available.
You could refer to this article for more detailed instructions: What if my device failed to detect the 6 GHz Wi-Fi Band