Starting with the Dimensity 1200 (MT6893), MediaTek introduced Secure Loader Authentication (SLA) and Download Agent Authentication (DAA) . This means SP Flash Tool alone will NOT work without a special auth_sv5.auth file provided by the manufacturer.
The Smart Phone (SP) Flash Tool is the official utility used to flash firmware onto MediaTek-based devices. To successfully flash an MT6893 chip, you must use , though version 6.x (often called the SP Flash Tool V6) is highly recommended. The version 6 architecture is specifically redesigned to handle the complex storage partitioning and security configurations found in modern Dimensity chips. The MediaTek Secure Boot Obstacle mt6893 flash tool
Update or downgrade your Android version. Remove FRP Lock: Bypass Factory Reset Protection (FRP). Starting with the Dimensity 1200 (MT6893)