A remix of the wall mount from https://www.thingiverse.com/thing:1873760
Fits the monitor_mount.stl from the link.
The original wall mount was too close to the wall for my monitor, so i extended it a bit, angled it a bit upwards, and added support. It's probably overengineered a lot for just a monitor so it may hold up to a bigger tv as well.
I printed in PLA 20% gyroid and it has held up my 28" monitor just fine for a couple weeks now.
The author hasn't provided the model origin yet.