So i followed basically the answer in this answer, but neither SwitchResX nor RDM activate 1920x1080 "HiDPI" resolution. I am using 2 LG UltraGear 27GP850 1440p displays. I saw someone else had the same issue, but there were no answers.
The only thing from the guide i didn't do was deactivating SIP, since this seems to be no longer needed in Monterey.
Did anybody face the same issue and maybe found a solution?