SilverStone 1x NVMe & 2x SATA SSD to PCI-Ex4 Adapter Card

What B550 Motherboard support 2x pcie x4 nvme slots? 2x m 2 ssd slot nvme pcie gen4 The card physically has an X4 interface, so it could be plugged into an X4, X8, or X16 slot It can still physically only access 4 lanes (else 2xl slot Buy Sabrent 1TB Rocket NVMe Gen4 PCIe Internal SSD Extreme Performance Solid State Drive online at low price in India on

2x m2 ssd slot nvme pcie gen4 B550 chipset doesn't have pcie gen 4 lanes so the pcie support on B550 comes from cpu that has 20 lanes 16 for gpu and 4 for m2 nvme