Yeelight Smart Ceiling C2001S500 works only on China mainland server

Hi all,
I’m an enthusiastic owner of a number of Yeelight Smart Ceiling lights, all the old series (450, 480 and 650).
To have them work with Google Home I had to connect to Singapore server.

I purchased recently in Italy a Smart Ceiling C2001S500, happy to have also a square shaped light, but now that it’s arrived it seems impossible to join in the Singapore server. The Yeelight app finds it only when connected to China Mainland server.
Everything is updated to most recent version/firmware.

Thank you in advance for any helping!
Best regards,