I can add all my yeelight and mijia lights to yeelight app. Set lan access for all. Link yeelight to google home for yellight lights. And link Mi ome to Google home for Mijia lights - even though I’ve not added them to MiHome…???
Once you add any lights to Yeelight app it will be in MiHome. And other way round. They use same cloud infrastructure. Ofcourse, if you use same server - i.e. China server.
So I’ve logged into MiHome with the same account as yeelight - all good. All the devices are there. Have then resync’d Googlehome with mihome and removed the duplicate Yeelights to a hidden room.
I guess I didn’t need to actually log into Mi Home.
I have three of these - https://www.mi.com/global/smartlamp - listed in Yeelight app. and thus in MiHome using the same account as yeelight app. And thus in Google Home using MiHome integration.