There have been laws regarding the compulsary reporting by church leaders of child abuse since the mid-80's in most states. I'm not familiar enough with the case to be able to say if that was the case here so I don't know if they would be criminally charged but there is also a statute of limitations there and I'm not familiar with that state's or even federal law.
It is still a criminal act though to be willfully negligent and that has been on the books longer than mandatory reporting of child abuse. Willfully negligent means you know stuff is going on and you decide against doing anything about it. You can be willfully negligent for example by not restraining your child in a car seat, failing to seek help for someone in a medical emergency or other dangerous situations or not reporting certain crimes immediately.
The case here is a jury case though. They can off course appeal and they will and they will come up with some grounds but there won't be a new jury case unless the higher courts decide something was improperly handled by the current judge. And it's really hard to overturn a jury case especially when it comes to this kind of stuff, the courts can only decide whether the case was improperly handled, the punishment is excessive or the conviction alters their rights to freedom of religion, freedom of assembly etc.
They probably will appeal based on their first amendment rights but the fact that they have to pay out money doesn't impede their first amendment rights or their freedom of religious rights. The judge nor jury decided that they have to change their religious doctrine regarding child abuse or stop assembling.