I managed to get it working.
I bought 4 Yeelight light strip plus. 2 worked ok and integrated with HomeKit immediately from Mi Home App and Yeelight app.
2 of them would not connect from either Mi home or Yeelight.
So this is what I did:
- On Mi Home app changed my server location from Chinese mainland to one in Europe.
- Added the strips to this new empty home.
- Removed the recently added strips
- Changed back to Chinese mainland server
- Added the light strips
- And then followed the usual process: from Mi Home or Yeelight app
- It worked.
Let me know if it works for you.