What I would do is talk to a collision repair center about your airbag not deploying. I've seen airbags deploy after the fact when the original collision wasn't enough to set it off at the time of collision. They're extreeeemely dangerous if they go off at the wrong time, and can really mess you up badly if you have a limb or your face in the way. So it's much more important that the black marks on the car.
Ask anyone who has worked wrecks where airbags haven't deployed. It's a very scary thing. But you don't have time to let the battery backup drain to prevent deployment if someone is injured.
A collision center will have a much better idea of whether or not it needs to be investigated. They may say all is well. If not, they can disable the airbag and make sure everything is as it should be, replace things that may be questionable, so you won't have the expense of them repacking an airbag like you would if it
had gone off.