They stopped publishing youth unemployment because it was useless data, the job of the youth is to become educated, not to work in the economy. Having a low youth unemployment means your youth are either not getting educated, or are being forced to work during their education.
At least in the US, unemployment is almost always defined defined as people who want to work but can’t find work. Students are generally excluded.
Subtract the “defense” costs that are paid for by other means in most of the world (healthcare, education, medical research), adjust the rest for purchasing power parity, and get back to me on that.