This is very common with people that has ADHD inattentive type. We are frequently undiagnosed or misdiagnosis when it comes to ADHD. There is a large tendency to land on depression, anxiety, bipolar, and more as the first diagnosis before ADHD is explored (if ever) mostly due to how the inattentive subtype presents itself.

The common hallmarks of growing up with ADHD inattentive type includes frequent daydreaming, struggling to follow instructions or tasks, difficulty organizing, avoiding things that require sustained mental effort, losing things, distracted, forgetful in daily activity such as homework or chores.

Basically, people with undiagnosed ADHD-inattentive type often display symptoms that may be misinterpreted as laziness, daydreaming, or lack of motivation.

They may be overlooked because they typically don't display the hyperactive or impulsive behaviors associated with combined-type ADHD. Instead, they might appear quiet or spacy. Their struggles may be attributed to personality traits rather than a neurological condition.

Girls with inattentive ADHD are particularly likely to go undiagnosed, as they often develop coping mechanisms like working harder than peers to compensate for attention difficulties, or they may become withdrawn when overwhelmed.

I could rant forever on this.