Thunderbolt No Drivers Loaded - Dell TB16

[Grippy98]

I'm trying to use this with a Dell TB16 over Thunderbolt.

Displayport out works fine and I'm driving a 3440x1440p display at 120Hz excellently while carging, however I'm not getting USB, Ethernet or Audio from the dock.

Looking under system report, under Thunderbolt it says "Thunderbolt: No drivers are loaded.
"

Note that this is after having rebooted with the dock plugged in.

Any ideas?

[Grippy98]

Booting into Windows then Restarting makes the dock work, but Thunderbolt still says it doesn't load drivers. Very strange. Also no hot-plug of course.