Add four PCIe x1 slots to Raspberry Pi CM4 IO with Waveshare PCIe-Packet- Switch-4P board - CNX Software
ASMedia PCIe Gen2 Packet Switch | Taiwantrade
ASMedia Chipset ASM2824 Dual M.2 NVMe PCIe 3.0 X16 Adapter Built in PCI-e Switch | eBay
Asmedia PCIe package switch Gen 3 Maximum 4 Downstream port | Taiwantrade
Exploring the Powerhouse: A Deep Dive into PCIe Switch Chipsets for PCIe Gen3-M.2 NVMe Cards
Amazon.com: FebSmart PCIE 3.0 X1 to 6-Ports 6Gbps Max Speed SATA III Expansion Card, ASMedia ASM1166 None-Raid PCIE 3.0 SATA III Card, Plug and Play on Windows OS, MAC OS, and Linux
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 Chipset ASM2824 Dual M.2 NVMe PCIe 3.0 X16 Adapter Built in PCI-e Switch | eBay
PCIe lane switching
ASMedia Preps ASM2824 PCIe 3.0 Switch
Exploring the Powerhouse: A Deep Dive into PCIe Switch Chipsets for PCIe Gen3-M.2 NVMe Cards
U31X4-PCIE8XE102 | 8-port USB 3.0 | 8-port USB 3.2 Gen 2 (10G) to PCIe x8 Gen 3 Host Card | Asmedia ASM3142 | Host Cards