NVMe PCIe M.2 NGFF SSD to PCIe X1 4.0 adapter card with bracketUS H4J*QU | eBay
Does the PCIe x1 m.2 adapter work? Yes, but there are some downsides.
JMT M.2 M Key NVMe SSD a PCI-e PCIe x1 Adattatore Riser Card PCIe 4X a 1x Cavo di prolunga Flessibile Cavo Piatto PCI Express 1x Gen3.0 R14SF (15cm) : Amazon.it: Informatica
Acquista Nvme Pcie M.2 Ngff Ssd alla scheda adattatore Pcie X1 Pcie X1 alla scheda M.2 con staffa | Joom
Pcie X1 To Msata Ssd + Sata3.0 Expansion Card Pci Express Mini Ata Ssd Adapter | Fruugo IT
PCIe X1 to M.2(NGFF)+SATA 6G (HDD/SSD) w/ Standard Profile Bracket ASM1061 PCI Express to B Key M.2 SATA SSD 2230 2242 2260 2280 - AliExpress
Will M.2 PCIe 3.0 SSDs slow down on M.2 PCIe X1 Adapter? --- M.2 PCIe X1 Speed Testing - YouTube
Card PCI Express x1 per 2x HDD/SSD SATA - KM Soltec Srl
GLOTRENDS M.2 PCIe X1 Adapter con vite M.2 per M.2 PCIe 4.0/3.0 SSD (NVMe/AHCI Key M), installazione PCIe X1/X4/X8/X16 Lane, ma solo velocità PCIe X1 (PA09-X1) : Amazon.it: Informatica
Acquista Nvme Pcie M.2 Ngff Ssd alla scheda adattatore Pcie X1 Pcie X1 alla scheda M.2 con staffa | Joom