Huawei stopped providing unlock codes years ago.
An open-source implementation of Google Play Services that allows many apps to run without the full Google framework. GBox / GSpace: Custom Rom For Huawei P40 Pro
Before you even think about a custom ROM, you must verify that your current EMUI version is unlockable (typically EMUI 10.1 or early 11 builds). If you’ve taken recent over-the-air updates, you are likely out of luck. Huawei stopped providing unlock codes years ago
Before you proceed: