A script to fix EDID problems on external monitors in macOS ↗ Reading List
<time datetime="2022-08-17 08:44:40 +0200 +0200">17 August 2022</time><span class="px-2 text-primary-500">·</span><span>101 words</span><span class="px-2 text-primary-500">·</span><span title="Reading time">1 min</span>
Finally I found the missing link to set up EDID overrides on Big Sur and later, where System Integrity Protection (SIP) is enabled.
In short, MacOS also takes overrides from the path /Library/Displays/Contents/Resources/Overrides, which is admin writable.