1xPCIe Card with 4x SATA M.2 via ASM1064 Chipset
https://www.amazon.com/dp/B0C9T89VJ8
Used in exi.
After installing, presents itself as a PCIe device:
03:00.0 SATA controller [0106]: ASMedia Technology Inc. ASM1064 Serial ATA Controller [1b21:1064] (rev 02)
Subsystem: ZyDAS Technology Corp. Device [2116:2116]
Kernel driver in use: ahci
Kernel modules: ahci