I had some Meross switches working in a round about way. I used the Google Assistant Webserver addon. In addition to being able to send broadcast messages to google assistant it could also send commands, so as long as you set up your switch (meross or otherwise) through google assistant you could control it with the help of this addon. Unfortunately, many users (myself included) are currently having issues with the addon. I really hope they work out the kinks as this is a wonderful way of using cheap components that only work through google assistant to work with HA.