Requires a specific downgrade to EMUI 10 followed by the "Googlefier" or "LZ Play" method.
Unlocking the bootloader typically requires third-party paid services or "test point" methods that involve opening the phone—neither of which is supported by Huawei. Custom Rom For Huawei P40 Pro
Because the P40 Pro launched without Google, the most sought-after "mod" is getting the Play Store to work. Requires a specific downgrade to EMUI 10 followed