If anyone is interested, I used https://github.com/albertogeniola/MerossIot to make a custom component: https://github.com/soberstadt/homeassistant-config/blob/master/custom_components/meross.py & https://github.com/soberstadt/homeassistant-config/blob/master/custom_components/switch/meross.py
I have been running this stably for two weeks now with my 110 models, so I can vouch for it.
https://github.com/ping-localhost/meross-custom-component is also out there that was based off my work, but I have not used it, so have fun 