Anecdotally, this isn’t limited to adolescents. There is a weird trend toward over-diagnosing common life struggles as major clinical health issues requiring intervention. I think this comes from a place of good intentions, where people don’t want to miss anyone who might have a major mental health issue that will benefit from treatment. However, over-diagnosing mental health conditions and convincing kids they even common struggles are actually mental health issues that require advanced treatment techniques has the opposite effect of amplifying common struggles into something much bigger.
There’s a secondary phenomenon in some demographics wherein having a mental health diagnosis is perceived as providing some social advantage, as weird as that sounds. This isn’t just conjecture, it’s actual policy in some schools. It’s well-known among kids that having an ADHD diagnosis will grant people extra time to take tests in some schools, which becomes a cheat code for getting a leg up. I’ve also witnessed young adults swapping tips on how to say the right things to get certain mental health diagnoses and get specific drugs: Xanax for anxiety, etc. They were even swapping names of doctors and notes about who was more lenient about prescribing certain drugs in a Slack community. Coming up with rules to stop that behavior without triggering complaints about stigmatizing mental illness was a challenge.