Huawei Mate 9 in US started to receive Android Oreo 8.0, updated started to hit all unlocked Mate 9 devices in US. Oreo update should be for models MHA-L29 and L09, the International unlocked models capable of working on the major GSM networks in US.
Till now we do not have any official changelog for the update. The Update brings all the new features available in the Android Oreo such as improved notifications and settings. It also brings certain AI features inside for the camera app and Dynamic wall paper feature which is already available in Honor View 10.