Hi there,
After a bit of googling I found various posts by users who managed to fully unlock the bios to get access to undervolting and memory overclocking.
Unfortunately I wasn’t able to find a guide specific for this model.
The original v2.02 can be found here: Razer Blade 15" Advanced (2021) BIOS Updater | RZ09-0409
If anyone could mod it and post the modified file, that would be awesome!
Thanks!