I have now set up WEMO mini switches and they work well with GH.
After setting them up via the WEMO app and naming them such as Dining room light. I then open the Google home app and then click on the menu / Home Control which shows my current devices and can assign them to different rooms and can tell it to turn lights on/off. No need to set up IFTT.
After setting them up via the WEMO app and naming them such as Dining room light. I then open the Google home app and then click on the menu / Home Control which shows my current devices and can assign them to different rooms and can tell it to turn lights on/off. No need to set up IFTT.