I’ve also tried to get that information on macOS before, but annoyingly all promising (i.e. related to the SOP protocol which is how the computer talks to the chip in the cable) log lines seem to be redacted.

This is doubly frustrating in that it shows that it’s clearly available to the OS (and not handled by a lower layer controller), but also leaves the faint hope that Apple might implement just such a feature in the future.