We must teach our children the value of time, money and effort. Otherwise they can fall into wrong path easily and it might be damage their next 5-10-15 and even their life. Gambling is required some kind of patience and intelligence skills luck isnt enough only.
I am not sure about other community - but in our community parents have a very strict check on their kids. Even if kids play adult games they do it in hidden.
But replying to OP - I think the mobile phone and internet time should be controlled. Giving kids freedom of everything is inviting trouble!
I also have a strict parents and even my relatives, they don’t let their Children to expose much of their time on their mobile phones which I think is really good, I’m also living on a country where we don’t tolerate much of this thing but sometimes, things are really uncontrolled by the parents. Proper guidance is the key here, if they get exposed on gambling that could be a big trouble for the whole family.