The open source version of Android is still available. Why wouldn’t that be getting updates?
you can get updates through their own app store AppGallery, but your paid apps are paid through Google, so don't expect them in order store, tying your money to Google ecosystem was bad idea in first place
Probably not after Android 8.
But Huawei has a large marketshare outside China. E.g. in Europe they are currently neck-to-neck with Apple in smartphone sales.