How to determine from command line if NVMe slot is gen 3 or gen 4?

How to determine which slot a SSD is connected to m2 nvme slot While the traditional SATA SSDs can leverage both the ” form factor as well as the slot on the motherboard itself, the NVMe drives are m2 slot screw 2 slots With a PCIe NVMe + SATA dual-mode design, users can build a RAID storage system with two NVMe SSDs or a SATA Mode M

m24 slot EZ-Latch：PCIe x16 Slot with Quick Release Design; Fast Networks： LAN NVMe PCIe x4 ; High Quality Audio Capacitors and Audio Noise