Is this the monitor?
https://www.asus.com/us/displays-desktops/monitors/zenscreen/zenscreen-mb14ac/
Asus claims that it accepts
- USB-C (DisplayPort Alt Mode) input
- DisplayLink input – if you connect it to a USB-A port on a computer with DisplayLink driver software installed
The resolution is 1920x1080.
Your Mac has native USB-C (DisplayPort Alt Mode) output. No need for the DisplayLink workaround.
So I would think that any USB-C to USB-C cable that is rated to be able to carry DisplayPort video would suffice to connect this monitor to your MacBook Air. Have you checked that this cable supports say, 4K @ 60 Hz (overkill in this case, but would be an indication that it should work)? And that it's not just a charging cable, or a cable whose maximum data transfer speed is only suitable for USB 2 and/or USB 3 data?