You're free to try other things. You're just not free to leave out a USB-C plug as long as that is the standard, and you will run into trouble if you try to play stupid games with adding power delivery profiles to your USB-C support that try to circumvent the goal of these regulations of removing device-specific cables or chargers.
If Apple "only" ends up offering a certification mark for USB-C chargers that have been tested with the iPhone and makes that easily accessible, they might well be in the clear. If they try to add power delivery profiles that are unavailable to everyone else, chances are the EU will react.
If Apple "only" ends up offering a certification mark for USB-C chargers that have been tested with the iPhone and makes that easily accessible, they might well be in the clear. If they try to add power delivery profiles that are unavailable to everyone else, chances are the EU will react.