(I thought I replied, but it seems to not be here, not sure if I forgot to hit Reply or what but trying this again)

Sadly not really.
Sometimes aftermath is used as a plot device- for example the Avengers series dealt with that a bit and who should be responsible for the actions of superheroes.

But for real 'full picture' it's almost never shown because it's messy and bloody and awful and really really sad. Think opening scene of 'Saving Private Ryan' just with a lot more feels. If those cars weren't blacked out you'd see blood everywhere and the people in them would be either wounded and screaming or gasping for air as their lungs fill with blood or dead and mangled as bullets tore their bodies apart. And if anyone else was in the back seat and survived you'd have the terrified screams of a child who just watched as Mommy get turned into so much hamburger meat and then the driverless car crashed. And then, perhaps hours or days later, you'd have families that break down in panicked screaming-cries when they are told their wife/husband/mother/father/son/daughter is never coming home.
Ask any of THOSE people, and any of them would happily trade Joker's life to get their loved one back.
The REALITY of serious violence can't be shown in PG-13 movies and even R movies either can't or don't often show it. People go to the movies to have fun and feel good, not see a bloody mess that makes them want to puke and then cry as they experience the pain of a broken family.

Perhaps this bothers me more than most because I HAVE seen what the real result is like. I was around for the shock video era in the 2000s and saw some really awful stuff from Chechnya. There's a bunch of combat footage coming from Ukraine. And closer to this subject, I've seen a lot of videos of defensive shooting incidents. It's not like movies, it's not fun. It's just brutal and sad.