If you need full system control, consider using a device from brands that still support bootloader unlocking (e.g., Google Pixel, OnePlus, Xiaomi with official unlock process). For the P30, focus on using it within Huawei's EMUI or HarmonyOS ecosystem.

I notice you're asking how to unlock the Bootloader on a Huawei P30 phone (written in pinyin: "ru he jie suo").

Would you like alternative suggestions for customization without bootloader unlock, or help with a different device?