The Chinese manufacturer has already started pushing a stable build of EMUI 9.1 to two of its flagship smartphones just a week after releasing it to beta testers. The update comes in at a whopping 4.56 GB.
https://www.notebookcheck.net/Huawei-is-rolling-out-EMUI-9-1-to-Mate-20-Pro-and-Mate-20-X.418247.0.html