Without near real-time telemetry, large percentages of accidents will go unreported simply because the manufacturer will never know about them. I would venture that most automobiles are repaired by third party shops that have no reporting requirements even if there are suitable logs stored on the vehicle.Have you looked at the raw data?
Column CY shows if the data came from telematic.
Sorting by Reporting Entity reveals that Honda doesn't have any reports via telematics.
The reason they have 90 reports seems to largely be related to the fact that there are around 5 million Honda vehicles with Honda Sense on the roads. So that 90 is extremely undercounted.
Subaru seems to have some telematics as they do have reports with CY as a yes.
A lot of Tesla's don't have telematics which is interesting.
A car that crashes may not send telemetry if the crash damages equipment needed to send the data. So, some data may not be available unless the car is returned to a dealer or manufacturer for repair. This likely explains Tesla's not having the telematics column marked.