But in the latest Huawei Mate 30, I discovered there is a system menu to enable "administrator" rights.
Settings ->Security->more settings->Device Administrator
The lzplay method also using the "admin" permission to install the google apps.
It's quite interesting that user can choose to activate or deactivate the admin rights granted to apps like lzplay.
I am not sure how much permission does this administrator have, but it definitely installing gapps to the mate30. May be we can use this admin rights to do something more.
Hope this thread will inspire developers who want to do something to bring google back yo the device