Yes. I just plugged in my Contour Shuttle Express, configured settings in the Shuttle Configuration and was able to assign shortcuts in vMix (v19).

In case this has not been resolved, here is what I did to get the ShuttleExpress working for me.

To get the buttons to work, I mapped shortcuts to regular keyboard buttons, then mapped the keyboard shortcuts in the Contour settings program that came with the driver (https://www.contourdesign.com/)

For the jog and shuttle, vMix uses the mouse scroll wheel and key combinations. In the Contour software, I mapped a "Mouse Wheel" event with the appropriate jog and shuttle actions. The following is taken from the vMix User Guide (Instant Replay/Controller Options Section).

"The mouse scroll wheel can be used at any time in the following ways:

With Shift key pressed: Slow down or speed up playback (SHIFT + SCROLL UP / DOWN)

With Ctrl key pressed: Move backwards or forwards one frame at a time. (CTRL + SCROLL UP / DOWN)

With Alt key pressed: Move backwards or forwards one second at a time." (ALT + SCROLL UP / DOWN)

The one issue I had however, which was probably linked to the mouse action, was that I had to have the main vMix window in focus, and not the Instant Replay page, which we have on another monitor. I notice I have to do this with the mouse as well. The shuttle that I had on loan from a friend was faulty so I never used it on an actual production. Because of this, some shortcut mappings may have to be tweaked to a bit.