Using biometric technology for age verification looks pretty good, this could be a good solution to reduce access to gambling sites by minors.
But even so, those (minors) who already know about gambling sites will do everything they can to be able to open them again.
Actually, a very important role lies with parents, as parents must be able to keep their children from being connected to any gambling sites. If parents care about their children, then parents will be the first protection from gambling sites.
Although with this technology, I'm not sure this will prevent the protection of children under their age, they can still enter because various ways will be done because the internet is unavoidable, it's quite easy for children to access it.
In fact, I agree with you how important the role of parents is, if you don't want this to happen then parents must be vigilant, even though the internet is now free, they should be able to check it on a scale this will help their children remain a protection that is not wild, therefore I have The principle is that I will continue to watch over my child when he is a child, when he is an adult it will become his own care.