Edit your post and please correctly identify the system model and motherboard model/revision.
Provide actual bios dump and link to original bios file from the OEM.
(Presumably could we be talking about a ThinCentre Mxx with a IS6XM motherboard…?)
EDIT: A dump is taken from the running system and its own bios, not taken from a bios file.
Theres 2 methods, no success guarantee for both, to update the bios with NVMe mod.
Using a dump with Intel FPT tool and using the motherboard ME_DIS jumper or using a CH341 programmer. Lenovo mod flashes are not easy…
Heres a brief description of the method using the ME_DIS on a M92
Modify the BIOS of a Lenovo M92 to enable native NVMe support (tachytelic.net)
The NVMe mod its easy to do, the hard part and with high risk to the user of a bricked system, is the mod flashing itself operation.
Mod files usually wont be accepted to flash using regular methods for each OEM/System model, due to security issues it will fail.
Users can share their own files here ont he forum (Compressed 10Mb MAX) or in their private shared services like GDrive, Odrive etc…
A user here on the forum, with a M93:
Lenovo M93p Nvme mod - BIOS/UEFI Modding / BIOS Modding Requests - Win-Raid Forum (level1techs.com)