Bulb non available in Google home or alexa

Hi, community!

I’m a proudly owner of 6 yeelight from.years ago.

Recently I have bought the sixth device ( all six devices are colour bulb) but I can’t see him in Alexa or Google home.

Other five devices works perfectly whit the vocal assistant but the sixth works only on the app.

How can i link him on my assistant?

My Id is: 1606529052

Anyone can help me please?