For Raspberry Pi 4, X862 V2.0 M.2 NGFF SATA 2280 SSD Storage Expansion Board – Geekworm
SSK Aluminum M.2 NVME SSD Enclosure Adapter, USB 3.1/3.2 Gen 2 (10 Gbps) to NVME PCI-E M-Key Solid State Drive External Enclosure Support UASP Trim (Fits only NVMe PCIe 2242/2260/2280) - Walmart.com
The M.2 interface
Amazon.com: SUPERPLUS M Key SSD NVME M.2 SSD(Key M) Key B SSD to U.2 SFF-8639 Adapter SSD m.2 Enclosure(Not SATA Interface) : Electronics
Connect a M.2 (B & M) key SSD into a B socket - Super User
B Key M.2 NGFF MSATA SSD to SATA 3.0 Adapter 2 in 1 Converter Card for PC Laptop | eBay
M.2 B Key SSD to 2.5" SATA Enclosure Drive Case 2280 2260 2242 NGFF Adapter Box | eBay
Amazon.com: M2 NVME NGFF SATA SSD to Type-C/USB 3.0 Portable External Drive Enclosure Case for M/B/M+B Key Case 2230/2242/2260/2280 SSD : Electronics
Amazon.com: M.2 to USB Adapter, RIITOP NVMe to USB 3.1 Reader Card Compatible with Both NVMe (PCI-e) M Key SSD & (B+M Key SATA Based) NGFF SSD : Electronics
Cryo-PC M.2 B Key SSD PCIe SATA Adapter card - NWCA Inc.