'HiddenPort' is not a property known to DriverKit, and a DriverKit USB Serial adapter driver is not able affect to affect nor control whether or not it is listed in Networking Preferences.
It is not possible to write a DriverKit USB Serial adapter driver that will appear in Networking Preferences and can be used to provide a dial-up network connection.
tricheer
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Has the problem been solved? Bothering me for a long time, the same code on macOS 11 can work normally, but will RegisterEthernetInterface failure on macOS 12