That Wix page is hardly superb: Google is basically saying that CWV will negatively affect ranking. IE organic traffic. Content is always important but if you lead-generation relies on Google organic then the most amazing piece of content simply won't appear anywhere where it will be seen. We have no idea of knowing what the relationship of a good piece of content is versus an override factor that Google might place if that same piece of content has poor CWV scores. It's all conjecture but maybe WIX knows something we don't.
Our own website scores on Lighthouse (tested incognito) higher than 93 across all tests on both mobile and desktop. However, performance is 68 on desktop and 19 on mobile. There is nothing we can do about that as these resources are locked up in parts of the SS CMS that are not accessible for optimisation.
I had heard that they were doing something about this, it has certainly been a curve ball for all website developers.
You can use pre-connect and pre-fetch to improve things a bit, as well as loading some of the standard scripts by hosting locally.
Everyone that has commented here should write to support.
