I can't install Linux on the ASUS ExpertBook B9450FA (BIOS 319): I can't switch from Intel RST to AHCI even though I've modified the EFI PchSetup variable. I need help

Hello, I tried installing Mint on my Asus B9450FA laptop (BIOS 319). I followed the instructions from Claude and Deepseek, but we weren't able to switch to RST. Additionally, I confirmed that BIOS v319 doesn't offer the option to switch to AHCI and that the vmd module isn't compatible with this hardware. I’m specifically looking for other users of the same model who have successfully installed Linux natively to learn their method.

Thanks in advance for your help.

Hardware:

Laptop: ASUS ExpertBook B9450FA

BIOS: version 319 (InsydeH2O) – latest available

CPU: Intel Core i7-10510U (Ice Lake)

Storage: 1 TB NVMe SSD (internal) – Windows 11 installed

Goal: Install Linux Mint 22.3 in dual boot (NVMe invisible under RST)