The dealer or leasing company still owns the car, so they need to know about the crash. Call them as soon as you finish talking to the insurance company.
Because the dealer owns the car, they might have certain requirements regarding repairs. For example, they could require that all repairs be made with manufacturer’s parts instead of secondary parts. If you do not follow their rules, then you have violated your leasing contract. Gear up for a lawsuit or to pay penalties for your violation.
Of course, some dealers could be very helpful after a wreck. It’s their car, after all, and they have an interest in making sure it is fixed properly. Avoid delay when reaching out to them.