WD19 USB0-C Dock Not Charging Surface Pro 7

I have a WD19 USB-C docking station that I would like to use occasionally with my Surface Pro 7. The Surface Pro 7 supports USB-C charging and the WD19 is supposed to be compatible with general USB-C charging up to 90W (the Surface Pro 7 requires 65W).

When I plug in the WD19, it mostly works... however it will not charge the Surface.  I have recently updated the firmware on the dock and installed all 4 of the available drivers but the problem persists.

Dell: There doesn't seem to be a category for docking stations (maybe there should be one?)