ProtonPlus Lancelot Flashing Guide

From MIUI (R-Vendor) /Rom Vendor-S:

• Flash 12.5.6 from fastboot

• Flash recovery.img from LineageOS

• Boot to recovery

• Flash ROM (also GApps and Magisk, but they're optional)

• Format data and boot to system.

From R-Vendor ROMs (A13, 12L, 12 and 11):

• Boot to recovery

• Flash 12.5.6 FW (Not always, only if the rom is not based on FW)

• Flash ROM

• Format data

• Flash GApps and Magisk if needed

• Boot to system.