Huawei, like LG, sits a little outside the normal scope of Android updates because the company typically releases a device at the end of the year with the latest version of Android pre-installed. The Huawei Mate 8 had Marshmallow out of the box and the Mate 9 had Nougat on board.
Huawei also doesn’t have any carrier agreements in the US, selling its phones in the country unlocked. While that means there are no carrier delays imposed on Huawei’s update rollouts, the company doesn’t have the best track record where pushing updates to its US devices are concerned.
The first Nougat update pushed out by Huawei was to the Huawei Mate 8 and P9 in China, coming three and a half months after Google released it. The first US update, as far as I can tell, came to the Huawei P9 Lite in mid-January, five months after Nougat appeared, with the Mate 9 getting a patch in early March followed by the Amazon Alexa update a couple of weeks later.
It’s impossible to judge a timeline for the Huawei Android 8.0 update due to the company’s lack of focus on the US market, its habit of releasing updates for select international regions (but not all), dropping early access betas and promising updates that never arrive. The Huawei Mate 10 should arrive with Oreo on board, but that’s about as accurate a prediction as we can make.
Best case scenario: Your guess is as good as ours