Yesterday EMUI 9.0 was introduced in India and although it will be officially out of the box on October 16 at the Mate 20 launch, other Huawei smartphones already started receiving the Beta. Latest info comes about the Honor Play with its serial number COR-L29, offered mainly in Europe and Middle East. The phone is eligible for the 188.8.131.52 build that brings new Android and UI features.
The build number is COR-L29C185E303R1P8B115 or COR-L29C432E303R1P8B110, depending on the actual unit. It brings some features like Adaptive Battery, Adaptive Brightness, Android Dashboard (which is actually Digital Wellbeing), GPU Turbo 2.0 and plenty of design improvements. There is also the standard security patch, dated October 2018.
If you arent into Beta variants, you should wait a bit more, but given the Honor Play has top-notch Kirin 970, will be among the first devices that will receive EMUI 9.0, based on Android Pie and it should arrive by the end of 2018.