Broken or not working ssd slot? Use the WIFI card port instead!!!

What motherboard? Some models don't support 2 NVMe drives For example, my B450M Pro4 will support NVMe drive on the first slot

PCIe SSD not showing in bios · Go into the bios, under the boot tab there is an option for CSM, make sure it is disabled · Click on secure

m2 expansion slot ASRock B450M steel legend motherboard tutorial link for correct type of ssd:

m2 vs nvme slot It means you bought an SSD that uses SATA, not PCIe You can't use it in that socket, put it on the other socket Only one slot on