Can't change brightness of AOC monitor from Mac
 

My AOC i1601fwux monitor works in most ways except the brightness can't be changed from my M1 Mac (on MacOS 12.0.1), and when it's connected and working, DisplayLink Manager 1.5.0 says "no monitor detected."
The product page says it uses USB-C DP Alt mode (https://us.aoc.com/en-US/products/mo.../specification).
Can this be fixed?