Bios Mods -The Best BIOS Update and Modification Source

Hi!
I'm the owner of the HP Omen 16 on AMD too
My system runs quits stable, but the PPT limits are too high, and I want to change them in BIOS
Have you tried using AMIBCP to change accessibility of the advanced menu tabs in HP GUI?
https://imgur.com/DYe8MTD
Seems clear to me that "setup configuration" in this app duplicates the view of the original HP Omen BIOS, like there are Main, Setup, Security etc tabs, but also some hidden options like Advanced or Chipset that simply can be inaccessible due to low rights level that can be adjusted by this tool.
https://imgur.com/4DAvDFn

Stupid idea, but:
Is it possible that HP simply removed or changed the AMI BIOS shortcut and put their own overlay over the default shortcuts instead?

I have also looked over it several times with AMIBCP, which seems to be stored in any case the complete AMI BIOS.

My Omen Laptop used an AMI-BIOS, it was shipped with Version F.18.
Since F.19, the power management was changed and give some lots of problems between the technical switch between internal and external graphics card. Currently F.21 was now released and the problem already not solved.

Now, i want to change back to F.18 with another solution.
The Problem is: HP has mark the versions since F.19 as "you cant revert back to older versions".

My idea is now to compare the versions and Change the internal version from F.18 to F.21 that i can use the old F.18 BIOS.

Can anyone help me to do this?

Here are the source files extracted from the installer-setup:
https://github.com/Bizarrus/BIOS/tree/ma.../088FF.bin
https://github.com/Bizarrus/BIOS/tree/ma.../088FF.bin
https://github.com/Bizarrus/BIOS/tree/ma.../088FF.bin

I have run the MMTool Aptio, but i dont know, which parts i must change
https://github.com/Bizarrus/BIOS/tree/ma.../088FF.bin