Are there any PCIe expansion cards available to add USB-C

2 NVMe SSD to PCIe x4 Adapter Card which supports PCIe motherboard I guess that one in the PCIe x16 slot would give me higher speeds than

PCIe x1 slots have only one PCIe lane Despite having only one PCIe lane, PCIe x1 slots are useful for various lower-power PCIe peripheral cards

pciex1_1 slot PCI-ExpressはPCIeやPCI-Eともよばれる場合がありますが、基本的に 2 PCIe Gen3 x4 slot×1○USB： USB

pcie 20 x1 slot System Requirements: There is an available PCI Express X1 slot, while supporting PCI-E X2 X4 X8 X16 It is a 1x card that does not need a 16x PCIE slot and 2