I dove into my archive of "Full Flash" dumps—gigabytes of raw data pulled from working phones over the years. I found "spes_global_full_rom.bin." Using a hex editor, I sliced out the first 4MB. That contained the GPT partition table, the Preloader, and the DLM partition (a backup of the Preloader's configuration).
Newer devices
Without bypassing these securities, most MTK Preloader Repair Tools will not work on modern devices (2022+). mtk preloader repair tool
Extract the preloader.bin from your stock firmware scatter file. I dove into my archive of "Full Flash"
A generic flashing tool like cannot fix a corrupted Preloader because SP Flash Tool relies on a working Preloader to communicate with the device. This is a catch-22: To flash the Preloader, you need a working Preloader. you need a working Preloader.