Unlock advanced BIOS settings (HP Pavilion Gaming 15-ec0000)

Hi. I just bought a new laptop with dedicated graphics card. The specs are: ryzen 3550h CPU, 8gb of memory, Nvidia GTX 1050 3gb GPU, 256 ssd. https://ssl.www8.hp.com/ie/en/products/laptops/product-detail.html?oid=29322788#!tab=models

I realized that the integrated graphics card uses 2gb of memory which is useless because i have a dedicated graphics solution (gtx 1050 3gb) so i am trying to reduce the amount of memory for my integrated graphics to 256mb.

Already tried to do it by accessing the BIOS and set thoose values there, but the Advanced (where usually this settings are placed) is missing. Searched guides of how to unlock this settings for this BIOS, but none of them works.

BIOS vendor: AMI

BIOS version: F.02 Rev.A

Please could you help me to solve this issue?