danger. I assume that this does not workmight convert mcio to pcie slot. Not sure if 2 x8 mcio would work as single x16 pci though. But mico x8 to pci x8 (mechanical x16) should work in theory.
the MCIO conns of the MS33-CPA-V10 are labeled U2 (NVMe) and are very sure not usable for PCIe purposes.
the BIOS detects NVMe drives, the lanes are not available for other usage.