UEFI Adata XPG SX6000 PCIe M.2 SSD driver on Axagon PCem2-d on ASUS M5a97 r2.0

Please help with getting the following setup boot from PCIe SSD.

MB: ASUS M5a97 r2.0
PCIe adapter: Axagon PCem2-d
SSD: Adata XPG SX6000 M.2

We’d like to use the following method to mod BIOS with UEFI driver - https://www.lanis.nl/do/view/Main/M5A97R20SamsungBIOS

The guide is made for Samsung SSD but if UEFI Adata XPG SX6000 driver could be found the method should work.
I’ve tried to use MMTool to seek for it in the latest ASUS BIOSes of modern MB but the firmware fails to open in the app, not sure why.

Can anyone provide pointers how to get to the UEFI Adata driver or a BIOS mod already capable of using the disk?

Please, no Clover alternatives. Thank you.