Yes, rescan, re-enroll too. But it still shows as disconnected.
I don't know if the firmware is completely incompatible, but it is weird that under windows works and in Linux doesn't
It's embedded in the laptop (a HP ZBook from work). Disconnected as in network. Laptop charges, but signal doesn't work. With Thunderbolt 3 devices, it works. (The card itself is T4).
Also check the BIOS settings (try setting TB security to "No Security" or "User Authorization")
Some OEM Mellanox cards can be cross-flashed to NVIDIA's stock firmware, maybe that's also relevant.