Hello, I recently installed a double connected switch, I use Alexa, the switch works very well but in terms of voice assistance only one of the two buttons is recognized, after several hours of intensive research on the net I discovered that I needed to install the skill « virtual smart home » in order to create a second virtual switch that takes into account the button left out, to do this I have (I quote Amazon.fr
Hi @Quentin77 
I recommend creating a virtual device in Gladys within the MQTT integration.
Add an On/Off feature to it, and then you can create a scene that triggers when you turn it on or off, and that controls the « real » switch.
Then this device will appear in Alexa and you’ll be able to control it
I don’t know if that’s very clear — feel free to ask if you have any questions!