I made an adult account on an Xbox, Now it says it's a child account and is telling me I...

I can't remember 100% but I am sure whoever set up the child account can change it. Like if you made an adult account on the xbox before making the child account that adult account can change wether the child account is a child account or and adult one.
I will just test this out myself now and post how it went

but the message on screen is to have an adult purchase them FOR the child account. So, as the adult that owns the xbox live gold account, how do I do what the system is telling me to do? If, as an adult, I can not buy these for my child, why tell me I
can? And are the very childish avatar skins REALLY only meant for adult players? If child accounts cannot have them, your messaging should not tell the child to ask their parents to purchase them for them. It should just say something like “ Avatar skins (many
of which are obviously designed for children) cannot be purchased for a child account. So if you, as a parent buy your child an Xbox Live Gold account, please know that 5hey cannot access content design ped for xbox live gold members even with parent permission”.

Thanks for your quick response to my question, I really appreciate the efficiency

I understand that my account might be a child account, but are there any ways to make sure about that? It would be great if every single Microsoft users can check whether their account is a child one or an adult one by themselves.

I'm 18 years old now, and in my region (which is Taiwan), I'm surely an adult. I've checked the birthday in my account settings and it is correct. However, my account still seems to remain a child one(?

Please tell me how to change my account into an adult one. And also, tell me if there's any way to check whether my account is a child one or an adult one. Thanks.

but the message on screen is to have an adult purchase them FOR the child account. So, as the adult that owns the xbox live gold account, how do I do what the system is telling me to do? If, as an adult, I can not buy these for my child, why tell me I
can? And are the very childish avatar skins REALLY only meant for adult players? If child accounts cannot have them, your messaging should not tell the child to ask their parents to purchase them for them. It should just say something like “ Avatar skins (many
of which are obviously designed for children) cannot be purchased for a child account. So if you, as a parent buy your child an Xbox Live Gold account, please know that 5hey cannot access content design ped for xbox live gold members even with parent permission”.

Apologies for the confusion, we were referring to adult content restrictions. Content restrictions are usually managed through the adult account managing the child account. We recommend checking all the settings and purchase exceptions that you've set for
your children. Be sure to check out the
guide we have on granting exceptions for an account. Hopefully we can get your children these avatar items they're wanting.

Adult accounts cannot be made child accounts. Only child accounts can be converted to adult accounts. Not the other way around.

So I can't Immigrate it?

No