One crucial criterion for indigo child that distinguishes them from ADHD or any social-personality is ESP or psychic power.
If you don't have any of these then you're not Indigo. And none of this concerns you and none of your discussions matter.
If however you at least experience psychic phenomena on a regular basis and then check off almost all the boxes then you have very good reason to assume you're here as an Indigo by design.
The exact nature of how or why "Indigo"-ness came to be matters little. What matters more is that you are here, and you do not break. Not under pressure and not by self defeat. You do you.