I tried a few things to get my Mate 30 Pro to update to harmonry, but nothing worked. I tried putting my region to China and connecting to a Chinese VPN..nope. I tried logging into my other Huawei account that China was set as the default region. Again, no go. Sucks that they don't just release the full firmware online. Oh well, just got to wait.
Well if Huawei did not open harmony os overseas, all Huawei phones, will be forced to stay on Android 10, which is already two years old and will stop receiving any security updates altogether after September 2022.
EMUI 12, if ever released, will still stick on android 10 as Huawei is banned from android 11 and onwards.
So we will wait until September 2022, and maybe Huawei will release harmony os (3.0) to global, and maybe someone can figure out how to install GMS on it. (Or all Huawei phones will be literally discontinued completely on the software side in global, who knows what will happen?)