Would it be possible to display the Python version and/or it’s executable path in the CAS configuration dialog?

That’s where I would look for this information and it wouldn’t leave any potential for documentation not being up to date.

The FAQ currently states:

On Linux distributions it usually means LabPlot only works with the system version of Python.

What is the “system version”?

On my system python3 --version returns Python 3.10.12, but print(sys.version) in LabPlot returns 3.11.9 (main, Nov 10 2011, 15:00:00) [GCC 13.2.0]

The information about Python versions on Windows seems to be correct, but I would recommend to mention the LabPlot version we are talking about in the FAQ, since this will probably change in future versions.