Developers porting custom ROMs (like LineageOS or Pixel Experience) to MT6768 devices often provide a scatter file tailored to the new ROM's partition layout. This ensures the custom kernel and system files are placed correctly on the storage.
Many developers host clean scatter files on GitHub as plain text (.txt). Look for repositories named android_device_* for your device. The scatter file here is often part of a device tree. mt6768androidscattertxt high quality free
Search GitHub for:
"mt6768" "scatter.txt"
Many developers upload full dumps.