Yes. ADHD and Depression have characteristics similar to Bipolar 2.
My daughter was initially misdiagnosed in middle school by a pediatric psychiatrist. Her diagnosis was later changed to ADHD and depression. She is now 30, has a job she loves and no longer needs medication for either.
I too have ADHD and Depression. Once or twice an acquaintance has asked me if I’m bipolar.
I am comfortable with my diagnosis but when I hyperfocus or I’m excited about a project or doing something I really enjoy, I feel a bit manic. It makes me understand why there is confusion.