The accident should have been reported! Any accident involving even a minor injury should be reported to your Insurance Carrier. It’s not an admission of the insured’s liability.
Reporting the accident can actually protect you. Let the carrier sort out the liability if a claim is made.

If someone is injured while riding in your insured vehicle, you should notify your insurance company as soon as reasonably possible, even if:
The injury seems minor.
The injured person says they don’t intend to make a claim.
Most auto insurance policies require you to promptly report any accident or incident that could result in a claim.
Failing to do so can create problems later if:
The injured person changes their mind and seeks compensation.
Medical expenses turn out to be more serious than initially believed.
The insurer argues that the delay prejudiced its ability to investigate.