@Gcr23 

When your Wireless clients cannot access the network, you may refer to the following troubleshooting steps:
    1) Confirm whether the client can obtain IP address normally;
    2) Check the correctness of the client's network parameters;
    3) Check for IP address conflicts on the client, as an IP address conflict will cause the client's IP address to be unable to function normally;
    4) Check the connectivity between the client and the gateway;
    5) Check the client's connectivity to the DNS server;
    6) Confirm whether the internet can be accessed via the wired network;
    7) Test potential wireless interference that might prevent clients from accessing the internet;
    8) Check whether there are a large number of unauthorized multicast or broadcast sources in the network;
    9) Confirm that there is no special configuration affecting the client's internet access, such as ACL (Access Control List), URL Filter, or Portal authentication.
 

As for how to use the Omada APP to manage the EAP in standalone mode, here are the configuration steps:

    1. Connect your mobile device to the EAP's Wi-Fi network.

    2. Open the Omada App, and the EAP device will appear on the Standalone Mode > EAPs page. Tap on the EAP device you want to configure.

    3. Enter the username and password of the EAP to log in. Then you can view the device information, turn on/off the EAP's LED, and view wireless information and client information. What's more, you can locate, reboot, and reset the device.

Note that if your EAP is a brand new EAP in factory state, follow the setup wizard to complete the basic settings of the EAP.

If you have an issue finding the EAP on your Omada App, please refer to this FAQ for more suggestions:

https://www.tp-link.com/support/faq/4082/