As long online casinos and gambling sites are legal and easily accessible to everyone who owns or possesses smart devices and computers, teenagers and underages will always sort for ways and alternatives to gain access to them, regardless of the restrictions placed on those sites or their devices to stop or prevent them from participating in these activities.
Children and teenagers always have alternatives to be able to access online gambling and this is a problem that I think is difficult to solve. Teenagers can use the access of their parents or uncles or even other adults to enter online gambling that requires KYC. And another problem is that not all parents know how to use the parental control feature. Teenagers who play online gambling are teenagers who are not under the supervision and care of their parents. This makes them not know what is right and what is wrong, and then they become addicted to online gambling.
Honestly, I don't know the parental control feature. Luckily, my wife does.
The sad part today is that you can play even without KYC as long as you are not hitting the amount that you need to show some identification before you can withdraw or deposit. Anti-money laundering rules. But if a child or a teenager keeps it at the amount that won't hit that surface then he/she can gamble as much as he likes because there's nothing that needs to be passed to prove that you are an adult.
This is the problem and yet many people are still against KYC. Kids can get in and out without being noticed and probably now many of them are playing without the knowledge of their parents.