How to get Mac two-finger scrolling input?

I have an overhead map view implemented in game. I can get the character to move via PlayerController (which scrolls the map) by using key inputs and mouse dragging, but I’d like to implement two-finger scrolling for the Mac trackpad.

So far, I haven’t found any way to do this. There’s a “flick” gesture, but it doesn’t give any direction, and I can’t get the event to fire anyway. I tried InputTouch event, but it doesn’t seem to fire when using the trackpad. Any ideas?