Earlier quoted context omitted.
I think ADHD is the new norm. Huh? ADHD is a debilitating and disabling disorder... I don't think you're talking about ADHD.
ADHD has little to no physiological markers. As the floor of expectations for attention and executive functioning continues to rise, the rate of diagnosis increases.
ADHD is a deficit in dopamine processing/production within the brain, it has physiological signs that we can look for:
https://link.springer.com/article/10.1186/s11689-022-09440-2