Those are two completely different pages.
OpenMPSupport talks about the newly-supported bits, as of that release.
cxx_status talks, well, about status overall, not limited to supported
bits, with version info.
It’s a start but there is a lot missing and what is there is partially outdated. I’d add all features and if they are worked on, description of support, as well as the version they are landed in. What do you think?