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After charger, Apple removes USB-C cable from the box
(www.gizmochina.com)
This is a most excellent place for technology news and articles.
Not sure about USBC, but it was in their lightning cables.
It's not farfetched that they would also add it to their "certified USBC".
https://www.cultofmac.com/news/the-security-chip-inside-apples-lightning-cable-isnt-even-as-sophisticated-as-those-found-inside-printer-cartridges
Edit: apple isn't hiding this program, either. Nor should they. It has merit. But it can be abused, as it was with certified lighting cables.