You may try this method: [Experimental] NVMe Option ROM - BIOS/UEFI Modding / BIOS modules (PCI ROM, EFI and others) - Win-Raid Forum (level1techs.com)
And theres many more older Non-UEFI on the forum reported as success on this method…
You may try this method: [Experimental] NVMe Option ROM - BIOS/UEFI Modding / BIOS modules (PCI ROM, EFI and others) - Win-Raid Forum (level1techs.com)
And theres many more older Non-UEFI on the forum reported as success on this method…