Acer Predator Helios PH315-52 BIOS Advanced Options Unlock

so I’ve been trying to undervolt my CPU, when I started bumping into power delivery constraints. Temps are fine, but the tdp is locked and so is my BIOS.
I ran BACKUP_Tools20h2 to create a BIOS dump: Download results20.rar from Sendspace.com - send big files the easy way

Is there anyone who’s able and willing to unlock the advanced options and instruct me on how to flash it?

Many, many thanks in advance!