What happens when a 12 yr old posts another 12 year olds full name publicly on social media?

This seems like a parenting problem and not a legal one. Talk to the other parents and reach a resolution between reasonable adults.

Are there a website

Google is your friend. If you cannot find it thee I cannot tell you where to find it.

Nobody ever wins social media fights. Once the fight begins the trolls pile on to make everyone miserable. I suggest you block the person as...

What’s the process of filing a police report on someone whose threatening you over the internet?

If the police believe there is a credible threat of bodily harm they will consider getting involved. However, I always caution people not to enter...

Adults are free to cyber-sex, but minors are not. Even having a picture of one's self if you are a minor is considered having child pornography. ...

If a grocery store employee responsible for handling shopping carts stole my wallet out of the cart, is the store responsible?

The culprit here is the employee. Fill out a police report.

If you do not receive an explanation from Uber customer service, you can retain a lawyer to advocate for you. You don't want to sue them -- that...

I want to sue facebook?

If you do not receive an explanation from Facebook's customer service, you can retain a lawyer to advocate for you. You don't want to sue them...

Adults are free to cyber-sex, but minors are not. Even having a picture of one's self if you are a minor is considered having child pornography. ...

Is there any punishment for a minor who lies about their age?

It sounds like you did the right thing as a parent. I doubt anything further will come of this.