On your HUAWEI P30 Lite:
DC-Unlocker works best on EMUI 9.1 or early EMUI 10. If your P30 Lite has been updated to EMUI 12 (HarmonyOS), the exploit may be patched. You might need to downgrade firmware first using HiSuite’s “System Recovery” (older version). This guide assumes EMUI 9.1 or 10. How to Unlock Bootloader in HUAWEI P30 Lite phone
If you manage to unlock it: