As cool as this is there won't be an European alternative as long as all the apps you'd want to use on a smartphone require either Google Play or the Apple App store.
Aren't you basically describing a chicken and egg problem?
The EU can address that issue through regulation and competition requirements.
it does run some sort of Android emulation layer
It runs Android apps. Presumably, it has access to the Play store in some capacity, or a viable alternative.
Huawei just created new OS and removed all traces of Android and Linux. Just like that. If there is will, it is possible.