The user Lost_N_BIOS is no longer an active forum member since 2021.
Use the available linked NVMe mod files or you can do it yourself following the guide:
[HowTo] Get full NVMe Support for all Systems with an AMI UEFI BIOS - Special Topics / NVMe Support for old Systems - Win-Raid Forum (level1techs.com)
EDIT
@olson_canadian
By Lost quotes “Thanks for follow-up image, nothing hidden in there anyway”
Seems theres nothing to unlock on this bios, so all that remains is NVme mod or updated modules with UBU for ex.