Hey  @Tzed,

Unfortunately, there is no direct method of controlling a device via a Kasa wall switch, without the use of automations.

For your smart switches, you could set up a smart action that would look at the changes made to the switch - but that would be far from ideal as you would need to change the state of the light each time you wanted to toggle the devices.

You may consider looking at Tapo's Sub-Ghz line of devices, such as the S200D. These do not communicate over Wi-Fi and connect to a hub with a Sub-1 GHz frequency, allowing significant battery life and local communication with devices. If you sign into the Tapo app with the login used for the Kasa App, you will have the option to add your Kasa devices to the Tapo app, where you can create automations for both Tapo and Kasa devices.