I installed Big Sur and found out that windows were off screen when I plugged my external monitor. I reset NVRAM and the issue seemed to disappear. Later I did a reset from factory, also reset NVRAM again, installed Big Sur from scratch. A few days after, again windows off screen in the second monitor. Did a NVRAM reset, again seemed to fixed the issue. Permanently? Don't know yet...

There are some things that are not clear either from this discussion or from the video: What if I open a folder inside Documents, say a project folder in VSCode, it can do whatever it wants there, so this action of opening a folder from an app is giving it implicit consent to own the folder altogether? Can this permission be removed somehow? Where can I see all the implicit accesses I've given?