How to enter advanced BIOS on Legion 5?

[Artas1984]

My Lenovo Legion 5 17IMH05H can not run XMP settings on RAM, and therefore incorrectly drops DDR4 frequency to 2666 MHz, when it it actually supports 2933 MHz. I'd like to enter advanced BIOS and see if can manually set anything there.

1. What is the key combo to unlock advanced BIOS?

2. Do i need an older BIOS version (like v.38 or v.39) for it to work? My laptop is on the newest EFCN59WW.

3. Since it has an Intel Core i7, i assume there is no application/tool to change RAM settings in Windows like you can with Ryzen?