M.2 slot PCIe not working

[azzurro]

Hi,

i've got this motherboard click but the x1 M.2 slot unfortunately doesn't seem to recognize any PCIe peripherals. A Samsung Evo 970 Evo as well as an Optane P1600X work flawlessly though.
It has been hinted to me that the BIOS might not be looking at PCIe devices during enumeration.

Would this be something that could be modded in?

Thanks!