Microchip's New PCIe 4.0 PCIe Switches: 100 lanes, 174 GBps
ASMedia PCIe Interface Port Packet Switch | Taiwantrade
Amazon.com: Ableconn PEXM2-130 Dual M.2 PCIe NVMe SSD Adapter Card - PCI Express 3.0 x8 / x16 Support 2X M.2 NGFF (M-Key) PCIe NVMe SSD for Mac & PC (ASMedia ASM2824 Switch) -
ASMedia Preps ASM2824 PCIe 3.0 Switch
Amazon.com: TOP1 Extended 4-Ch PCIe Gen 2 ×1 Expander Expansion Board for Raspberry Pi Compute Module 4 Driver-Free PCIe-Packet-Switch-4P : Everything Else
Amazon.com: FebSmart PCIE to 6-Ports 6Gbps Max Speed SATA III Expansion Card for Desktop PCs, Plug and Play on Windows OS MAC OS Linux System, ASMedia ASM1166 None-Raid PCIE SATA III Host
Test PCIe switches and adapters · Issue #14 · geerlingguy/raspberry-pi-pcie-devices · GitHub