Yes. It is absolutely illegal. Not sure anywhere where this would be legal. Ie. "TV or radio ads about alcohol cannot target children. They also should not be irresponsible in targeting adults." https://www.acma.gov.au/ads-alcohol-tobacco-or-therapeutic-g...
You can't, as in any developed nation I can think of, advertise alcohol to children. Take a look at the actions the industry has taken when they even put alcohol ads too close to children, or too appealing to children, ctrl-f for moon dog. https://www.abac.org.au/wp-content/uploads/2018/04/ABAC-Quar...
You cannot advertise alcohol to children in Australia
I do agree though and would go further and make it illegal to show ads to anyone whose profile states they are under 18.