There's not even so much as a peep from the syslog either. Tried all 4 USB ports on the RBPi. From what I understand, it should show up as /dev/ttyACM0 or /dev/ttyACM1 if there's such a device already, but there's nothing. However, the LED does light up and does it's Yellow-Red-Blue routine which from what I'm reading is normal. It's getting power from the USB port at least.
I've plugged it into a windows machine to see if it's detected there, and it immediately gets assigned a COM port in the Device Manager, so it does seem to work. Plugging in a random USB memory stick into the Raspberry Pi 4 shows up immediately and makes syslog spit out information about it, so the USB ports are functional.
Does anybody have any idea what might be the issue here?
Here's a screenshot of the output of some commands while both the Aeotec Z-Stick and USB memory sticks are inserted:
Here is it showing up fine in Windows: