Active Data/Power cable will not send both at the same time

Hey, so I recently bought 16.4 ft version of this cable on amazon.

I'm trying to use it to power and send data to my 1080p 60hz portable monitor, from my M4 Mac Mini. However, it seems like the cable will only send data OR power, never both at once.

Is this just the wrong cable? It powers up the monitor on its own, but won't send any data. Only if I connect an outside power source to the monitor will the cable send display data. I've tried every available USB-C port, and yes it is in the correct direction.