https://wccftech.com/it-is-no-longer-possible-to-install-google-play-services-on-the-huawei-mate-30/

The Huawei Mate 30 was unveiled a few days ago amidst much fanfare. One major problem, however, was that all variants of the device launched without Google Play Services, which include apps such as the Play Store. Shortly after, a technique emerged online that let users install Google Play services on their Mate 30 devices using an enterprise management app that was based in China.

Google Play services, unlike other apps, can’t be sideloaded by installing an APK file as they require enhanced permissions. If a device launches without them, the only way to get them is sideloading them via a custom recovery such as TWRP. And, to install a custom recovery, the Bootloader needs to be unlocked. Huawei (and Honor) stopped providing Bootloader unlock codes to users stating that it would compromise the devices’ security.