I think the metric is blocked controllers, which is a small subset of 3rd party controllers. So far the most common people complaining about this change is cronus and xim users not legit players.
Most 3rd party controllers that are being sold online are still compatible afaict.
I don't think it has affected xim or cronus at all. They use official first party Xbox controllers to handle authentication, and MITM them to inject inputs.
Instead the big one affected has been Brooks, who make very popular boards for custom fighting game controllers.
Most 3rd party controllers that are being sold online are still compatible afaict.