Yeah, this article is really focused on FCC certification. But to your point, there are other sections on the site that are focused on CE certification and how to navigate getting certified so you can sell throughout the world.
In-house emc testing is quite fun and you dont need much more than a spectrum analyzer, antenna and E/H-field probes.
When done just for this purpose, it can be done much more cheaply than at a proper lab, because you do not need very accurate results.