Go to your phone settings - type „unknown“ into the search bar and then an option should pop up - activate it. After this, click on the APK and press install - done!
I've already done that, but it still doesn't work
Can you a screenshot of the error message?
Another solution would be to use joiplay to emulate the game.
The error message is gone too quickly before I can take a screenshot
I too have a huawei p30pro and i play it with joiplay and it works