Here in our country, online gambling is so widespread that even students are already experiencing gambling due to the lack of awareness about it. This is also because of the promotion of influencers who are mostly followers of minors.
So it is not surprising that even though they are minors, they will just use a different name and then they can play gambling through online. Which is very bad in my opinion.
Online gambling has become a common thing to do even in countries that actually prohibit gambling like in my country, generally people must have personal cell phones nowadays so they can easily see gambling advertisements that are spread online, this is also not limited of course everyone can see it so even school children now must also have personal cell phones that clearly must have an internet connection, moreover previously it was busy with online learning so it is only natural that school children already know about online gambling.
We know that children today are smart in operating their cell phones so there are ways they can do what they want including online gambling like the way you said.