NVMe x4 adapter card for PCIe x1 slot

Just ordered a PCI-E x1 M2 Adapter that will work in a PCI-E x1 slot so I can install my old NVME SSD into my machine

It does not recognize the card in the bios hardware viewer When I install it in the second CPU pcie 8x slot, it is recognized in bios

can you put a gen 4 ssd in a gen 3 slot It has nothing to do with the slot chosen, if an x1 card doesn't work in the board's regular PCIe slot, then it's highly unlikely it will if

cantik 4d slot What are PCIe x1 Slots Used For?