If your MacBook is locked at the BIOS/Firmware level (a black screen with a padlock), the "free" update is a bit simpler:
Improperly injecting payloads into the T2 chip via DFU mode can permanently damage the power management controller, rendering the logic board useless. macbook t2 bypass free upd
Note: Restoring will NOT remove an Activation Lock; it will simply bring you back to the "Activate Mac" screen. Risks to Consider If your MacBook is locked at the BIOS/Firmware
The community around T2 bypassing has shifted toward manipulation. By using a second Mac and the "Apple Configurator" tool, users can often "Revive" or "Restore" a T2 chip. Revive: Updates the firmware without erasing data. Restore: Erases the T2 chip and the internal SSD. macbook t2 bypass free upd