These internet age, you need to be techie as well and as far as I know there's a gadget to monitor every child and to filter out these bad actor apps and similar things like gambling. It's more like a filtering thing for what you can browse on a phone especially if it's for your child.
Childrens has a lot of access of everything over the net that's why its good for them to watch their child on what they are doing on internet because if they let them do whatever they want then provably this cases will still happen and worse their children will engage on illegal things at early age. Parents should explain and educate their child about huge risk and other things bothering in their mind because curiosity will always happen especially when children are misguided.