SSD using PCIE adaptor not detected

PCIe vs PCIe NVMe SSDs: What's the difference? m 2 slot with pcie x4 lanes 2 slots with x4 PCIE lanes each m2 slot types So basically, I keep hearing that NVMe cards need 4x PCIe lanes But then I keep seeing posts saying that they can run at 2x lanes

m2 sata vs nvme slot to allow 2 NVME drives to run in a PCIE x4 slot on a board without lane bifurcation (uplink is x4 and the card's config implements 2 x4