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Apple to Limit iPhone 15 USB-C Cables to USB 2.0 Speeds: Report
(www.extremetech.com)
This is a most excellent place for technology news and articles.
On top of what exactly? The EU law doesn't mandate certain transfer speeds.
The only thing mandated is a USB-C port to charge the device, and afaik that the fastest charging speed needs to be obtainable via USB-PD. The latter was always the case with iPhones, even though the port was different. Other manufacturers are actually way worse offenders when it comes to charging protocols, but Apple it obviously the worst offender when it comes to charging ports.
They are introducing changes to enforce USB-PD is present for charging.