I have HA set up and one of the integrations I have is TP-Link Smart Home. I have a couple of dozen of these smart switches and outlets, but when I initially set up HA, only clicked ADD on a few of them. Now I want to go back and add the rest, but I can’t find a way to do that. I’ve tried under Integrations and under Devices, but nothing lists the switches/outlets that I chose not to add the first time. Thanks.
Most likely you clicked ignore to get rid of them. Those are filtered out, until you go to the filter menu in the top right and select to show ignored and disabled integrations.
You can add them manually in the integration by adding devices to the TP-Link Smart Home integration.