Well, some bad news for you then. Even the Lenovo Legion laptops are packaged with what you might call a "Windows BIOS" which is pretty unworkable out of the box even on the 6.4+ kernels. I imagine this one has very specific features and settings that are similarly not easily worked around or supported (like power management and ACPI states). Someone will eventually work out the right combo of features and script a decent setup for these devices though.