I've seen some of the parents struggle on this part because most of them are busy with their work and businesses. But since most people are working from home, they're going to have more time and teach their children to not engage with gambling and it's too early for them or just tell them that they shouldn't be which is better.
But there are always cases where children managed to stay away from the eyes of their parents or parents aren't doing much research on what their child is doing it's not only gambling a child can get addicted to but there is other stuff such as heroin addiction and later on, forces them to commit crime because their norm earnings can't sustain the consumption of their drugs.
It is still part of parenting. They have an important role but there's a need to know what's the root cause of it. For children that are engaged with those things early, you really have to look at how the parents take care of them. If it's not for the parent's negligence, they will find the cause of it and will help their children to teach and explain why they shouldn't be engaged with those things. Too bad for those children that are engaged with those early if they've got no parents anymore but they should have the guardian or any relative that takes care of them.