It is available in many countries in Asia, which may extend to Europe and Africa very soon. This update brings several improvements and new features. The software version of this update is EMUI 10.0.0.138 (C636E7R1P5log). It has a heavy size, 4.64GB.
The company has already rolled out the EMUI 10.0 beta update to internal testers in September 2019 in China. This could be the open beta rollout for limited users.
Are you using the EMUI 10.0 beta update on your Mate 20 series device? Let us know in the comments below.