I don't know why I wanted to post something about it for the first time but then came "Users under 13 years of age can't post on social networks" but I don't understand why my date of birth is 2010 even though my date of birth is 2006. And I wanted to ask how you can change that
For that, I think you have to contact Nintendo support and describe your problem there. You can't change it manually because your birth date can't change.
I have tried several times, unfortunately does not work.
Ups wrong comment
Ok I have to look
Or try here: https://nintendo-de.custhelp.com/app/chat/chat_launch via the official Nintendo Live Chat
No that is not possible!