You must have your unique unlock code for this step.
You short-circuit a specific "test point" on the motherboard while connecting to the PC. How to Unlock Bootloader in HUAWEI P30 Lite phone
: On newer versions of EMUI (typically EMUI 10 or later), HUAWEI removed the oem unlock You must have your unique unlock code for this step
Ensure your phone is ready for the connection by enabling the following settings: Open > About Phone . How to Unlock Bootloader in HUAWEI P30 Lite phone
: Disabling boot security can make your device more vulnerable to unauthorized access if lost or stolen.