I'm about two weeks into working on a computer that came with Big Sur pre-installed.
ArchiCAD 22 and 24 were installed on top of it. We use software licenses only.
If you install v22 on Big Sur, it will
most likely not hurt your daily work in any manner. Modeling, 2D work, basic rendering, all work. No problems when I open, edit, or save data on existing Teamwork projects. Not a single crash.
There are minor visual problems witch window "chrome" (i.e. elements of window interface) but they are completely workable. I noticed a few missing logos that had to be re-linked into projects. This could be caused by the OS or by the fact that the server is now on a different network.